World Water Levels

high for the date

Lake Ontario at Olcott: history

On Lake Ontario at Olcott averaged 74.939 m above IGLD 1985.

That is above the normal range for the date, in the highest 5 percent of the daily averages of these dates in the 57 years between 1967 and 2025. The normal range for 4 October is 74.55 m to 74.88 m: the 10th to 90th percentile of the daily averages from 27 September to 11 October in 57 years between 1967 and 2025.

The last 90 days, against the normal range for each day
The last 90 days, against the normal range for each day 74.75 m 75.00 m 75.25 m 74.939 m
  • Level
  • Above the normal range
  • Normal range for the date
  • Median for the date
  • A year earlier
Daily averages of Lake Ontario at Olcott from 7 July 2026 to 4 October 2026, with the normal range for each day and the same days a year earlier.
Table: The last 90 days, against the normal range for each day
DayDaily average (m)Normal rangeMedianA year earlier
75.397 m74.910 m to 75.351 m75.101 m75.085 m
75.392 m74.905 m to 75.348 m75.099 m75.072 m
75.389 m74.905 m to 75.346 m75.096 m75.073 m
75.400 m74.904 m to 75.345 m75.093 m75.066 m
75.396 m74.905 m to 75.349 m75.090 m75.061 m
75.381 m74.905 m to 75.349 m75.089 m75.065 m
75.380 m74.905 m to 75.348 m75.086 m75.059 m
75.371 m74.905 m to 75.347 m75.083 m75.055 m
75.375 m74.903 m to 75.345 m75.075 m75.044 m
75.352 m74.903 m to 75.345 m75.069 m75.045 m
75.345 m74.903 m to 75.347 m75.063 m75.051 m
75.348 m74.902 m to 75.347 m75.059 m75.048 m
75.346 m74.901 m to 75.347 m75.054 m75.023 m
75.340 m74.900 m to 75.346 m75.050 m75.024 m
75.339 m74.899 m to 75.345 m75.046 m75.029 m
75.348 m74.898 m to 75.344 m75.044 m75.010 m
75.343 m74.894 m to 75.342 m75.042 m75.004 m
75.333 m74.888 m to 75.333 m75.038 m75.004 m
75.308 m74.886 m to 75.330 m75.036 m75.012 m
75.302 m74.884 m to 75.325 m75.030 m75.010 m
75.307 m74.883 m to 75.322 m75.028 m74.997 m
75.325 m74.882 m to 75.315 m75.024 m75.003 m
75.321 m74.876 m to 75.311 m75.023 m74.996 m
75.318 m74.872 m to 75.307 m75.020 m74.987 m
75.314 m74.864 m to 75.286 m75.015 m74.966 m
75.310 m74.860 m to 75.285 m75.012 m74.946 m
75.324 m74.851 m to 75.284 m75.007 m74.944 m
75.330 m74.846 m to 75.282 m75.005 m74.953 m
75.358 m74.844 m to 75.278 m75.000 m74.951 m
75.351 m74.840 m to 75.271 m74.997 m74.947 m
75.353 m74.836 m to 75.257 m74.996 m74.923 m
75.352 m74.834 m to 75.252 m74.994 m74.920 m
75.344 m74.831 m to 75.249 m74.992 m74.932 m
75.332 m74.828 m to 75.243 m74.989 m74.930 m
75.328 m74.824 m to 75.238 m74.981 m74.928 m
75.314 m74.820 m to 75.227 m74.973 m74.918 m
75.309 m74.816 m to 75.224 m74.965 m74.913 m
75.309 m74.814 m to 75.238 m74.960 m74.908 m
75.304 m74.803 m to 75.234 m74.953 m74.906 m
75.291 m74.789 m to 75.229 m74.946 m74.891 m
75.270 m74.785 m to 75.224 m74.942 m74.884 m
75.253 m74.782 m to 75.221 m74.939 m74.893 m
75.275 m74.778 m to 75.215 m74.933 m74.863 m
75.282 m74.775 m to 75.206 m74.929 m74.858 m
75.270 m74.771 m to 75.198 m74.926 m74.892 m
75.258 m74.768 m to 75.186 m74.920 m74.882 m
75.247 m74.765 m to 75.182 m74.917 m74.908 m
75.248 m74.763 m to 75.179 m74.911 m74.899 m
75.258 m74.761 m to 75.165 m74.907 m74.887 m
75.252 m74.757 m to 75.156 m74.900 m74.866 m
75.247 m74.751 m to 75.147 m74.894 m74.852 m
75.227 m74.748 m to 75.143 m74.888 m74.838 m
75.222 m74.746 m to 75.130 m74.882 m74.833 m
75.218 m74.744 m to 75.120 m74.877 m74.829 m
75.210 m74.741 m to 75.112 m74.874 m74.812 m
75.212 m74.733 m to 75.107 m74.870 m74.812 m
no value74.730 m to 75.099 m74.866 m74.809 m
no value74.725 m to 75.084 m74.862 m74.800 m
no value74.718 m to 75.073 m74.857 m74.801 m
no value74.713 m to 75.063 m74.852 m74.799 m
75.233 m74.700 m to 75.051 m74.849 m74.800 m
75.223 m74.691 m to 75.044 m74.843 m74.797 m
75.215 m74.687 m to 75.041 m74.837 m74.776 m
75.213 m74.683 m to 75.036 m74.832 m74.771 m
75.214 m74.678 m to 75.025 m74.827 m74.761 m
75.217 m74.672 m to 75.023 m74.823 m74.749 m
75.210 m74.665 m to 75.019 m74.818 m74.742 m
75.191 m74.660 m to 75.015 m74.813 m74.743 m
75.169 m74.656 m to 75.007 m74.808 m74.737 m
75.166 m74.647 m to 75.004 m74.803 m74.739 m
75.150 m74.642 m to 74.998 m74.795 m74.738 m
75.132 m74.639 m to 74.989 m74.788 m74.735 m
75.124 m74.635 m to 74.981 m74.784 m74.735 m
75.110 m74.632 m to 74.973 m74.776 m74.727 m
75.093 m74.627 m to 74.967 m74.770 m74.729 m
75.065 m74.622 m to 74.964 m74.767 m74.723 m
75.070 m74.618 m to 74.957 m74.758 m74.693 m
75.047 m74.611 m to 74.949 m74.753 m74.719 m
75.041 m74.602 m to 74.944 m74.750 m74.725 m
75.037 m74.597 m to 74.941 m74.744 m74.727 m
75.020 m74.590 m to 74.935 m74.739 m74.712 m
75.011 m74.588 m to 74.930 m74.734 m74.715 m
74.999 m74.585 m to 74.928 m74.729 m74.717 m
74.981 m74.582 m to 74.922 m74.725 m74.698 m
74.977 m74.577 m to 74.916 m74.719 m74.696 m
74.971 m74.568 m to 74.912 m74.715 m74.689 m
74.957 m74.565 m to 74.907 m74.709 m74.659 m
74.951 m74.561 m to 74.901 m74.703 m74.646 m
74.961 m74.555 m to 74.892 m74.698 m74.650 m
74.939 m74.552 m to 74.881 m74.692 m74.665 m
The last 12 months, against the normal range for each day
The last 12 months, against the normal range for each day 74.5 m 75.0 m 75.5 m Lowest 74.237 m 74.939 m
  • Level
  • Below the normal range
  • Above the normal range
  • Normal range for the date
  • Median for the date
  • Our record
Daily averages of Lake Ontario at Olcott from 4 October 2025 to 4 October 2026, with the normal range for each day.
Table: The last 12 months, against the normal range for each day
DayDaily average (m)Normal rangeMedian
74.665 m74.552 m to 74.881 m74.692 m
74.664 m74.545 m to 74.879 m74.690 m
74.655 m74.541 m to 74.875 m74.683 m
74.656 m74.533 m to 74.873 m74.677 m
74.651 m74.529 m to 74.870 m74.672 m
74.637 m74.527 m to 74.867 m74.668 m
74.620 m74.523 m to 74.864 m74.663 m
74.627 m74.519 m to 74.859 m74.659 m
74.612 m74.516 m to 74.855 m74.655 m
74.591 m74.511 m to 74.852 m74.651 m
74.582 m74.503 m to 74.847 m74.648 m
74.603 m74.501 m to 74.840 m74.644 m
74.585 m74.494 m to 74.834 m74.641 m
74.585 m74.491 m to 74.830 m74.636 m
74.575 m74.484 m to 74.825 m74.632 m
74.568 m74.478 m to 74.821 m74.624 m
74.555 m74.474 m to 74.818 m74.620 m
74.561 m74.469 m to 74.816 m74.616 m
74.544 m74.468 m to 74.813 m74.611 m
74.555 m74.466 m to 74.810 m74.608 m
74.557 m74.463 m to 74.809 m74.605 m
74.551 m74.461 m to 74.803 m74.603 m
74.543 m74.459 m to 74.802 m74.601 m
74.533 m74.453 m to 74.802 m74.599 m
74.525 m74.450 m to 74.800 m74.597 m
74.510 m74.447 m to 74.800 m74.594 m
74.527 m74.444 m to 74.800 m74.591 m
74.482 m74.441 m to 74.798 m74.588 m
74.525 m74.438 m to 74.797 m74.583 m
74.529 m74.435 m to 74.797 m74.580 m
74.497 m74.430 m to 74.798 m74.577 m
74.509 m74.426 m to 74.799 m74.573 m
74.519 m74.419 m to 74.802 m74.567 m
74.515 m74.414 m to 74.799 m74.564 m
74.515 m74.403 m to 74.799 m74.562 m
74.513 m74.401 m to 74.802 m74.560 m
74.526 m74.400 m to 74.807 m74.558 m
74.491 m74.401 m to 74.807 m74.557 m
74.476 m74.397 m to 74.809 m74.556 m
74.483 m74.397 m to 74.812 m74.553 m
74.493 m74.395 m to 74.813 m74.551 m
74.505 m74.395 m to 74.813 m74.549 m
74.506 m74.396 m to 74.814 m74.547 m
74.492 m74.396 m to 74.814 m74.546 m
74.485 m74.396 m to 74.814 m74.543 m
74.499 m74.396 m to 74.815 m74.542 m
74.502 m74.395 m to 74.815 m74.542 m
74.498 m74.394 m to 74.815 m74.541 m
74.488 m74.394 m to 74.815 m74.543 m
74.490 m74.394 m to 74.815 m74.542 m
74.477 m74.391 m to 74.817 m74.542 m
74.489 m74.390 m to 74.821 m74.542 m
74.501 m74.389 m to 74.821 m74.542 m
74.467 m74.390 m to 74.822 m74.541 m
74.434 m74.388 m to 74.823 m74.542 m
74.459 m74.387 m to 74.817 m74.541 m
74.482 m74.385 m to 74.815 m74.541 m
74.469 m74.383 m to 74.814 m74.541 m
74.480 m74.383 m to 74.811 m74.542 m
74.484 m74.383 m to 74.810 m74.543 m
74.456 m74.383 m to 74.810 m74.543 m
74.465 m74.382 m to 74.810 m74.542 m
74.468 m74.383 m to 74.810 m74.542 m
74.446 m74.384 m to 74.808 m74.542 m
74.458 m74.385 m to 74.808 m74.542 m
74.453 m74.386 m to 74.808 m74.543 m
74.446 m74.387 m to 74.807 m74.543 m
74.449 m74.387 m to 74.807 m74.544 m
74.434 m74.388 m to 74.807 m74.544 m
74.420 m74.388 m to 74.807 m74.544 m
74.425 m74.391 m to 74.805 m74.544 m
74.428 m74.394 m to 74.805 m74.545 m
74.416 m74.396 m to 74.804 m74.546 m
74.417 m74.400 m to 74.808 m74.549 m
74.398 m74.403 m to 74.812 m74.550 m
74.437 m74.402 m to 74.820 m74.551 m
74.371 m74.404 m to 74.820 m74.551 m
74.427 m74.409 m to 74.826 m74.551 m
74.386 m74.410 m to 74.831 m74.553 m
74.423 m74.411 m to 74.835 m74.553 m
74.424 m74.414 m to 74.840 m74.554 m
74.419 m74.417 m to 74.845 m74.554 m
74.438 m74.420 m to 74.851 m74.558 m
74.471 m74.420 m to 74.853 m74.560 m
74.438 m74.421 m to 74.855 m74.563 m
74.468 m74.422 m to 74.858 m74.565 m
74.417 m74.422 m to 74.863 m74.567 m
74.435 m74.424 m to 74.870 m74.570 m
74.458 m74.428 m to 74.875 m74.573 m
74.468 m74.429 m to 74.879 m74.574 m
74.472 m74.429 m to 74.883 m74.574 m
74.472 m74.429 m to 74.885 m74.576 m
74.499 m74.430 m to 74.888 m74.577 m
74.508 m74.432 m to 74.890 m74.579 m
74.519 m74.435 m to 74.893 m74.582 m
74.507 m74.436 m to 74.898 m74.585 m
74.531 m74.436 m to 74.904 m74.587 m
74.521 m74.436 m to 74.917 m74.589 m
74.547 m74.437 m to 74.929 m74.593 m
74.516 m74.434 m to 74.936 m74.594 m
74.530 m74.437 m to 74.945 m74.598 m
74.558 m74.438 m to 74.954 m74.601 m
74.574 m74.438 m to 74.957 m74.604 m
74.586 m74.440 m to 74.964 m74.608 m
74.604 m74.450 m to 74.968 m74.612 m
74.581 m74.451 m to 74.970 m74.618 m
74.583 m74.461 m to 74.970 m74.621 m
74.560 m74.458 m to 74.977 m74.624 m
74.558 m74.451 m to 74.987 m74.630 m
74.598 m74.454 m to 74.993 m74.633 m
74.563 m74.453 m to 74.994 m74.638 m
74.581 m74.453 m to 75.002 m74.643 m
74.609 m74.452 m to 75.005 m74.647 m
74.644 m74.453 m to 75.011 m74.651 m
74.597 m74.453 m to 75.014 m74.655 m
74.576 m74.452 m to 75.017 m74.657 m
74.579 m74.452 m to 75.018 m74.658 m
74.589 m74.450 m to 75.019 m74.663 m
74.581 m74.449 m to 75.023 m74.669 m
74.586 m74.447 m to 75.028 m74.673 m
74.574 m74.445 m to 75.031 m74.675 m
74.566 m74.443 m to 75.034 m74.679 m
74.563 m74.442 m to 75.035 m74.684 m
74.557 m74.441 m to 75.036 m74.685 m
74.565 m74.439 m to 75.036 m74.686 m
74.554 m74.439 m to 75.037 m74.687 m
74.551 m74.439 m to 75.037 m74.687 m
74.546 m74.439 m to 75.038 m74.688 m
74.549 m74.439 m to 75.038 m74.688 m
74.553 m74.438 m to 75.038 m74.688 m
74.523 m74.439 m to 75.038 m74.690 m
74.538 m74.439 m to 75.036 m74.691 m
74.528 m74.441 m to 75.032 m74.693 m
74.532 m74.441 m to 75.031 m74.694 m
74.546 m74.440 m to 75.032 m74.696 m
74.528 m74.442 m to 75.031 m74.698 m
74.522 m74.444 m to 75.031 m74.701 m
74.549 m74.444 m to 75.031 m74.705 m
74.541 m74.444 m to 75.031 m74.709 m
74.549 m74.444 m to 75.031 m74.712 m
74.558 m74.444 m to 75.030 m74.714 m
74.567 m74.443 m to 75.030 m74.715 m
74.552 m74.442 m to 75.028 m74.715 m
74.555 m74.442 m to 75.028 m74.716 m
74.555 m74.444 m to 75.028 m74.719 m
74.563 m74.444 m to 75.028 m74.721 m
74.570 m74.447 m to 75.030 m74.723 m
74.555 m74.447 m to 75.031 m74.724 m
74.558 m74.448 m to 75.032 m74.728 m
74.565 m74.450 m to 75.031 m74.735 m
74.566 m74.451 m to 75.032 m74.737 m
74.561 m74.453 m to 75.032 m74.739 m
74.574 m74.457 m to 75.037 m74.748 m
74.570 m74.468 m to 75.042 m74.752 m
74.569 m74.473 m to 75.046 m74.755 m
74.580 m74.477 m to 75.054 m74.755 m
74.598 m74.479 m to 75.057 m74.759 m
74.622 m74.482 m to 75.059 m74.760 m
74.636 m74.485 m to 75.074 m74.761 m
74.646 m74.486 m to 75.077 m74.762 m
74.695 m74.489 m to 75.081 m74.764 m
74.670 m74.491 m to 75.084 m74.766 m
74.753 m74.492 m to 75.086 m74.761 m
74.720 m74.496 m to 75.090 m74.762 m
74.700 m74.499 m to 75.091 m74.766 m
74.758 m74.501 m to 75.097 m74.767 m
74.757 m74.507 m to 75.101 m74.770 m
74.779 m74.508 m to 75.105 m74.773 m
74.797 m74.511 m to 75.108 m74.778 m
74.788 m74.514 m to 75.113 m74.783 m
74.795 m74.517 m to 75.118 m74.784 m
74.801 m74.523 m to 75.118 m74.792 m
74.821 m74.527 m to 75.122 m74.797 m
74.813 m74.535 m to 75.123 m74.803 m
74.837 m74.546 m to 75.129 m74.809 m
74.818 m74.552 m to 75.135 m74.817 m
74.843 m74.562 m to 75.143 m74.819 m
74.852 m74.572 m to 75.152 m74.822 m
74.901 m74.578 m to 75.166 m74.826 m
74.914 m74.583 m to 75.176 m74.828 m
74.953 m74.589 m to 75.183 m74.835 m
74.936 m74.598 m to 75.196 m74.839 m
74.966 m74.605 m to 75.214 m74.850 m
74.965 m74.613 m to 75.228 m74.856 m
74.995 m74.621 m to 75.241 m74.864 m
74.992 m74.629 m to 75.252 m74.872 m
75.035 m74.648 m to 75.261 m74.885 m
75.030 m74.654 m to 75.266 m74.897 m
75.040 m74.659 m to 75.277 m74.911 m
75.035 m74.667 m to 75.284 m74.917 m
75.068 m74.674 m to 75.297 m74.923 m
75.056 m74.679 m to 75.314 m74.928 m
75.076 m74.683 m to 75.320 m74.934 m
75.113 m74.692 m to 75.332 m74.940 m
75.127 m74.697 m to 75.335 m74.949 m
75.151 m74.703 m to 75.338 m74.955 m
75.173 m74.714 m to 75.345 m74.967 m
75.181 m74.721 m to 75.350 m74.974 m
75.190 m74.728 m to 75.358 m74.985 m
75.225 m74.734 m to 75.368 m74.998 m
75.229 m74.740 m to 75.373 m75.006 m
75.238 m74.746 m to 75.377 m75.011 m
75.252 m74.753 m to 75.382 m75.022 m
75.282 m74.758 m to 75.386 m75.035 m
75.269 m74.772 m to 75.394 m75.045 m
75.293 m74.779 m to 75.401 m75.050 m
75.306 m74.782 m to 75.404 m75.057 m
75.303 m74.788 m to 75.404 m75.057 m
75.313 m74.793 m to 75.406 m75.062 m
75.330 m74.796 m to 75.408 m75.073 m
75.323 m74.800 m to 75.408 m75.078 m
75.334 m74.807 m to 75.408 m75.085 m
75.341 m74.808 m to 75.412 m75.092 m
75.348 m74.812 m to 75.416 m75.100 m
75.357 m74.820 m to 75.418 m75.105 m
75.359 m74.823 m to 75.419 m75.110 m
75.365 m74.825 m to 75.420 m75.114 m
75.367 m74.828 m to 75.420 m75.117 m
75.364 m74.832 m to 75.421 m75.118 m
75.364 m74.838 m to 75.422 m75.123 m
75.373 m74.843 m to 75.448 m75.127 m
75.385 m74.847 m to 75.454 m75.129 m
75.388 m74.848 m to 75.488 m75.131 m
75.384 m74.850 m to 75.495 m75.132 m
75.387 m74.853 m to 75.503 m75.133 m
75.397 m74.855 m to 75.506 m75.134 m
75.394 m74.858 m to 75.510 m75.135 m
75.396 m74.860 m to 75.522 m75.135 m
75.383 m74.864 m to 75.525 m75.135 m
75.386 m74.866 m to 75.532 m75.135 m
75.385 m74.871 m to 75.530 m75.134 m
75.418 m74.872 m to 75.537 m75.134 m
75.428 m74.874 m to 75.537 m75.134 m
75.412 m74.879 m to 75.539 m75.133 m
75.422 m74.881 m to 75.539 m75.134 m
75.422 m74.883 m to 75.539 m75.136 m
75.420 m74.884 m to 75.533 m75.141 m
75.421 m74.889 m to 75.531 m75.143 m
75.418 m74.895 m to 75.522 m75.146 m
75.412 m74.899 m to 75.519 m75.148 m
75.413 m74.902 m to 75.515 m75.151 m
75.400 m74.907 m to 75.511 m75.147 m
75.401 m74.908 m to 75.508 m75.149 m
75.401 m74.909 m to 75.507 m75.151 m
75.399 m74.911 m to 75.507 m75.151 m
75.403 m74.914 m to 75.503 m75.151 m
75.400 m74.915 m to 75.499 m75.151 m
75.396 m74.917 m to 75.498 m75.151 m
75.386 m74.917 m to 75.495 m75.151 m
75.388 m74.917 m to 75.489 m75.152 m
75.388 m74.918 m to 75.482 m75.152 m
75.386 m74.918 m to 75.473 m75.151 m
75.386 m74.918 m to 75.464 m75.150 m
75.397 m74.918 m to 75.456 m75.149 m
75.409 m74.918 m to 75.447 m75.148 m
75.416 m74.918 m to 75.438 m75.146 m
75.417 m74.917 m to 75.433 m75.145 m
75.424 m74.916 m to 75.432 m75.145 m
75.424 m74.916 m to 75.431 m75.143 m
75.427 m74.916 m to 75.429 m75.141 m
75.423 m74.916 m to 75.423 m75.140 m
75.427 m74.916 m to 75.419 m75.138 m
75.406 m74.916 m to 75.412 m75.135 m
75.412 m74.914 m to 75.406 m75.134 m
75.430 m74.914 m to 75.403 m75.133 m
75.415 m74.913 m to 75.398 m75.132 m
75.417 m74.911 m to 75.394 m75.131 m
75.408 m74.910 m to 75.389 m75.130 m
75.403 m74.911 m to 75.384 m75.126 m
75.411 m74.911 m to 75.381 m75.124 m
75.414 m74.911 m to 75.379 m75.120 m
75.420 m74.909 m to 75.371 m75.117 m
75.420 m74.911 m to 75.367 m75.112 m
75.429 m74.910 m to 75.365 m75.109 m
75.417 m74.910 m to 75.361 m75.106 m
75.406 m74.910 m to 75.354 m75.103 m
75.397 m74.910 m to 75.351 m75.101 m
75.392 m74.905 m to 75.348 m75.099 m
75.389 m74.905 m to 75.346 m75.096 m
75.400 m74.904 m to 75.345 m75.093 m
75.396 m74.905 m to 75.349 m75.090 m
75.381 m74.905 m to 75.349 m75.089 m
75.380 m74.905 m to 75.348 m75.086 m
75.371 m74.905 m to 75.347 m75.083 m
75.375 m74.903 m to 75.345 m75.075 m
75.352 m74.903 m to 75.345 m75.069 m
75.345 m74.903 m to 75.347 m75.063 m
75.348 m74.902 m to 75.347 m75.059 m
75.346 m74.901 m to 75.347 m75.054 m
75.340 m74.900 m to 75.346 m75.050 m
75.339 m74.899 m to 75.345 m75.046 m
75.348 m74.898 m to 75.344 m75.044 m
75.343 m74.894 m to 75.342 m75.042 m
75.333 m74.888 m to 75.333 m75.038 m
75.308 m74.886 m to 75.330 m75.036 m
75.302 m74.884 m to 75.325 m75.030 m
75.307 m74.883 m to 75.322 m75.028 m
75.325 m74.882 m to 75.315 m75.024 m
75.321 m74.876 m to 75.311 m75.023 m
75.318 m74.872 m to 75.307 m75.020 m
75.314 m74.864 m to 75.286 m75.015 m
75.310 m74.860 m to 75.285 m75.012 m
75.324 m74.851 m to 75.284 m75.007 m
75.330 m74.846 m to 75.282 m75.005 m
75.358 m74.844 m to 75.278 m75.000 m
75.351 m74.840 m to 75.271 m74.997 m
75.353 m74.836 m to 75.257 m74.996 m
75.352 m74.834 m to 75.252 m74.994 m
75.344 m74.831 m to 75.249 m74.992 m
75.332 m74.828 m to 75.243 m74.989 m
75.328 m74.824 m to 75.238 m74.981 m
75.314 m74.820 m to 75.227 m74.973 m
75.309 m74.816 m to 75.224 m74.965 m
75.309 m74.814 m to 75.238 m74.960 m
75.304 m74.803 m to 75.234 m74.953 m
75.291 m74.789 m to 75.229 m74.946 m
75.270 m74.785 m to 75.224 m74.942 m
75.253 m74.782 m to 75.221 m74.939 m
75.275 m74.778 m to 75.215 m74.933 m
75.282 m74.775 m to 75.206 m74.929 m
75.270 m74.771 m to 75.198 m74.926 m
75.258 m74.768 m to 75.186 m74.920 m
75.247 m74.765 m to 75.182 m74.917 m
75.248 m74.763 m to 75.179 m74.911 m
75.258 m74.761 m to 75.165 m74.907 m
75.252 m74.757 m to 75.156 m74.900 m
75.247 m74.751 m to 75.147 m74.894 m
75.227 m74.748 m to 75.143 m74.888 m
75.222 m74.746 m to 75.130 m74.882 m
75.218 m74.744 m to 75.120 m74.877 m
75.210 m74.741 m to 75.112 m74.874 m
75.212 m74.733 m to 75.107 m74.870 m
no value74.730 m to 75.099 m74.866 m
no value74.725 m to 75.084 m74.862 m
no value74.718 m to 75.073 m74.857 m
no value74.713 m to 75.063 m74.852 m
75.233 m74.700 m to 75.051 m74.849 m
75.223 m74.691 m to 75.044 m74.843 m
75.215 m74.687 m to 75.041 m74.837 m
75.213 m74.683 m to 75.036 m74.832 m
75.214 m74.678 m to 75.025 m74.827 m
75.217 m74.672 m to 75.023 m74.823 m
75.210 m74.665 m to 75.019 m74.818 m
75.191 m74.660 m to 75.015 m74.813 m
75.169 m74.656 m to 75.007 m74.808 m
75.166 m74.647 m to 75.004 m74.803 m
75.150 m74.642 m to 74.998 m74.795 m
75.132 m74.639 m to 74.989 m74.788 m
75.124 m74.635 m to 74.981 m74.784 m
75.110 m74.632 m to 74.973 m74.776 m
75.093 m74.627 m to 74.967 m74.770 m
75.065 m74.622 m to 74.964 m74.767 m
75.070 m74.618 m to 74.957 m74.758 m
75.047 m74.611 m to 74.949 m74.753 m
75.041 m74.602 m to 74.944 m74.750 m
75.037 m74.597 m to 74.941 m74.744 m
75.020 m74.590 m to 74.935 m74.739 m
75.011 m74.588 m to 74.930 m74.734 m
74.999 m74.585 m to 74.928 m74.729 m
74.981 m74.582 m to 74.922 m74.725 m
74.977 m74.577 m to 74.916 m74.719 m
74.971 m74.568 m to 74.912 m74.715 m
74.957 m74.565 m to 74.907 m74.709 m
74.951 m74.561 m to 74.901 m74.703 m
74.961 m74.555 m to 74.892 m74.698 m
74.939 m74.552 m to 74.881 m74.692 m
The last 10 years, weekly averages
The last 10 years, weekly averages 74.5 m 75.0 m 75.5 m 76.0 m Highest 75.939 m Lowest 74.237 m 74.963 m
  • Level
  • Our record
Weekly averages of Lake Ontario at Olcott from the week of 3 October 2016 to 4 October 2026.
Table: The last 10 years, weekly averages
Week startingWeekly average (m)
74.599 m
74.535 m
74.529 m
74.528 m
74.525 m
74.507 m
74.479 m
74.457 m
74.464 m
74.471 m
74.459 m
74.456 m
74.476 m
74.526 m
74.592 m
74.674 m
74.710 m
74.748 m
74.797 m
74.837 m
74.880 m
74.946 m
74.992 m
75.021 m
75.043 m
75.084 m
75.209 m
75.357 m
75.437 m
75.516 m
75.634 m
75.818 m
75.872 m
75.885 m
75.878 m
75.850 m
75.810 m
75.796 m
75.797 m
75.751 m
75.712 m
75.681 m
75.633 m
75.577 m
75.502 m
75.423 m
75.347 m
75.239 m
75.172 m
75.096 m
75.039 m
74.982 m
74.902 m
74.923 m
74.867 m
74.820 m
74.851 m
74.894 m
74.875 m
74.862 m
74.844 m
74.808 m
74.784 m
74.758 m
74.750 m
74.754 m
74.800 m
74.867 m
74.912 m
74.918 m
74.901 m
74.879 m
74.920 m
74.966 m
74.970 m
74.949 m
74.915 m
74.893 m
74.928 m
74.977 m
75.059 m
75.120 m
75.191 m
75.261 m
75.299 m
75.301 m
75.283 m
75.274 m
75.225 m
75.199 m
75.184 m
75.150 m
75.095 m
75.041 m
75.038 m
74.983 m
74.945 m
74.920 m
74.901 m
74.852 m
74.803 m
74.778 m
74.731 m
74.691 m
74.674 m
74.688 m
74.632 m
74.590 m
74.593 m
74.616 m
74.631 m
74.624 m
74.670 m
74.709 m
74.721 m
74.715 m
74.764 m
74.792 m
74.807 m
74.826 m
74.879 m
74.901 m
74.942 m
75.003 m
75.001 m
74.994 m
74.967 m
74.961 m
74.981 m
74.990 m
75.046 m
75.078 m
75.156 m
75.298 m
75.463 m
75.598 m
75.742 m
75.829 m
75.893 m
75.922 m
75.929 m
75.914 m
75.919 m
75.880 m
75.828 m
75.805 m
75.764 m
75.693 m
75.627 m
75.539 m
75.480 m
75.403 m
75.341 m
75.278 m
75.228 m
75.174 m
75.116 m
75.073 m
75.027 m
75.019 m
75.045 m
75.072 m
75.065 m
75.020 m
75.019 m
75.003 m
74.987 m
75.019 m
75.015 m
75.022 m
75.002 m
75.064 m
75.106 m
75.160 m
75.149 m
75.144 m
75.117 m
75.091 m
75.146 m
75.181 m
75.213 m
75.236 m
75.257 m
75.293 m
75.346 m
75.362 m
75.386 m
75.395 m
75.376 m
75.368 m
75.360 m
75.352 m
75.334 m
75.288 m
75.265 m
75.231 m
75.206 m
75.196 m
75.163 m
75.132 m
75.108 m
75.068 m
75.039 m
75.005 m
74.963 m
74.908 m
74.860 m
74.794 m
74.773 m
74.740 m
74.705 m
74.694 m
74.671 m
74.630 m
74.615 m
74.592 m
74.596 m
74.614 m
74.628 m
74.628 m
74.614 m
74.669 m
74.684 m
74.642 m
74.608 m
74.600 m
74.573 m
74.549 m
74.547 m
74.522 m
74.491 m
74.484 m
74.489 m
74.508 m
74.573 m
74.603 m
74.634 m
74.652 m
74.682 m
74.729 m
74.747 m
74.748 m
74.731 m
74.719 m
74.722 m
74.722 m
74.735 m
74.742 m
74.771 m
74.826 m
74.875 m
74.885 m
74.868 m
74.869 m
74.846 m
74.857 m
74.829 m
74.817 m
74.782 m
74.794 m
74.777 m
74.780 m
74.796 m
74.778 m
74.819 m
74.859 m
74.863 m
74.884 m
74.873 m
74.858 m
74.859 m
74.884 m
74.886 m
74.891 m
74.864 m
74.857 m
74.882 m
74.897 m
74.898 m
74.871 m
74.867 m
74.928 m
74.948 m
74.961 m
74.983 m
75.049 m
75.085 m
75.102 m
75.135 m
75.173 m
75.200 m
75.212 m
75.196 m
75.178 m
75.165 m
75.165 m
75.170 m
75.152 m
75.114 m
75.063 m
75.002 m
74.951 m
74.938 m
74.896 m
74.839 m
74.783 m
74.717 m
74.694 m
74.657 m
74.600 m
74.562 m
74.520 m
74.490 m
74.434 m
74.418 m
74.413 m
74.399 m
74.395 m
74.391 m
74.418 m
74.421 m
74.439 m
74.473 m
74.478 m
74.461 m
74.520 m
74.601 m
74.659 m
74.687 m
74.713 m
74.722 m
74.745 m
74.793 m
74.817 m
74.857 m
74.869 m
74.857 m
74.916 m
74.984 m
75.074 m
75.129 m
75.173 m
75.237 m
75.344 m
75.412 m
75.395 m
75.366 m
75.316 m
75.259 m
75.258 m
75.224 m
75.215 m
75.188 m
75.148 m
75.136 m
75.116 m
75.103 m
75.085 m
75.069 m
75.032 m
75.004 m
74.961 m
74.919 m
74.841 m
74.791 m
74.741 m
74.699 m
74.638 m
74.603 m
74.561 m
74.526 m
74.491 m
74.478 m
74.449 m
74.481 m
74.471 m
74.510 m
74.543 m
74.549 m
74.577 m
74.606 m
74.653 m
74.710 m
74.727 m
74.712 m
74.718 m
74.714 m
74.727 m
74.744 m
74.757 m
74.759 m
74.787 m
74.836 m
74.925 m
74.958 m
74.967 m
74.975 m
74.978 m
74.968 m
74.963 m
74.956 m
74.948 m
74.931 m
74.947 m
74.951 m
74.977 m
75.030 m
75.000 m
74.966 m
74.940 m
74.929 m
74.925 m
74.880 m
74.843 m
74.803 m
74.773 m
74.763 m
74.714 m
74.640 m
74.567 m
74.529 m
74.495 m
74.455 m
74.417 m
74.398 m
74.385 m
74.387 m
74.423 m
74.449 m
74.466 m
74.466 m
74.483 m
74.491 m
74.481 m
74.465 m
74.461 m
74.467 m
74.448 m
74.453 m
74.470 m
74.529 m
74.605 m
74.652 m
74.723 m
74.777 m
74.810 m
74.852 m
74.886 m
74.948 m
74.999 m
no value
75.100 m
75.106 m
75.114 m
75.097 m
75.097 m
75.093 m
75.069 m
75.041 m
75.009 m
74.971 m
74.933 m
74.902 m
74.884 m
74.835 m
74.797 m
74.749 m
74.726 m
74.716 m
74.667 m
74.637 m
74.584 m
74.552 m
74.519 m
74.513 m
74.492 m
74.491 m
74.472 m
74.465 m
74.436 m
74.407 m
74.440 m
74.460 m
74.521 m
74.574 m
74.588 m
74.583 m
74.557 m
74.538 m
74.545 m
74.558 m
74.569 m
74.660 m
74.757 m
74.818 m
74.927 m
75.028 m
75.125 m
75.241 m
75.315 m
75.357 m
75.383 m
75.399 m
75.418 m
75.402 m
75.390 m
75.420 m
75.416 m
75.416 m
75.394 m
75.360 m
75.330 m
75.317 m
75.346 m
75.304 m
75.262 m
75.233 m
no value
75.204 m
75.120 m
75.032 m
74.963 m
The whole record since 1967, monthly averages
The whole record since 1967, monthly averages 74.5 m 75.0 m 75.5 m 76.0 m Highest 75.939 m Lowest 74.237 m 75.111 m
  • Level
  • Our record
Monthly averages of Lake Ontario at Olcott from 1 January 1967 to 4 October 2026.
Table: The whole record since 1967, monthly averages
Month startingMonthly average (m)
74.582 m
74.586 m
74.527 m
74.754 m
74.963 m
75.085 m
75.144 m
75.093 m
74.958 m
74.896 m
74.860 m
74.763 m
74.672 m
74.685 m
74.729 m
74.900 m
74.892 m
75.014 m
75.082 m
74.969 m
74.848 m
74.647 m
74.529 m
74.591 m
74.615 m
74.681 m
74.614 m
74.809 m
75.021 m
75.149 m
75.079 m
74.916 m
74.673 m
74.486 m
74.437 m
74.432 m
74.411 m
74.426 m
74.451 m
74.682 m
74.883 m
74.939 m
74.986 m
74.893 m
74.736 m
74.626 m
74.557 m
74.562 m
74.555 m
74.558 m
74.693 m
74.857 m
75.004 m
74.976 m
74.926 m
74.808 m
74.738 m
74.588 m
74.435 m
74.424 m
74.520 m
74.612 m
74.716 m
74.935 m
75.200 m
75.253 m
75.341 m
75.243 m
75.006 m
74.773 m
74.700 m
74.810 m
75.034 m
75.209 m
75.328 m
75.645 m
75.724 m
75.707 m
75.516 m
75.268 m
75.003 m
74.786 m
74.629 m
74.632 m
74.831 m
75.010 m
75.100 m
75.286 m
75.502 m
75.591 m
75.496 m
75.251 m
74.955 m
74.677 m
74.521 m
74.529 m
74.557 m
74.698 m
74.838 m
74.996 m
75.096 m
75.092 m
74.975 m
74.819 m
74.732 m
74.693 m
74.590 m
74.563 m
74.615 m
74.702 m
75.066 m
75.368 m
75.535 m
75.539 m
75.418 m
75.215 m
74.988 m
74.825 m
74.657 m
74.535 m
74.486 m
74.439 m
74.609 m
74.845 m
74.872 m
74.810 m
74.833 m
74.835 m
74.816 m
74.835 m
74.754 m
74.857 m
75.080 m
75.120 m
74.985 m
75.224 m
75.325 m
75.231 m
75.047 m
74.889 m
74.733 m
74.572 m
74.430 m
74.413 m
74.577 m
74.641 m
74.762 m
75.039 m
75.160 m
75.124 m
75.014 m
74.904 m
74.845 m
74.742 m
74.605 m
74.586 m
74.603 m
74.613 m
74.614 m
75.003 m
75.143 m
75.133 m
75.112 m
75.050 m
74.871 m
74.647 m
74.551 m
74.541 m
74.505 m
74.502 m
74.737 m
74.740 m
74.846 m
74.953 m
75.001 m
74.985 m
74.932 m
74.790 m
74.763 m
74.653 m
74.590 m
74.596 m
74.621 m
74.915 m
75.008 m
75.072 m
75.027 m
74.850 m
74.702 m
74.588 m
74.526 m
74.540 m
74.648 m
74.769 m
74.777 m
74.878 m
75.154 m
75.176 m
75.004 m
74.922 m
74.780 m
74.633 m
74.528 m
74.621 m
74.727 m
74.764 m
74.907 m
75.124 m
75.305 m
75.314 m
75.208 m
75.018 m
74.819 m
74.628 m
74.516 m
74.493 m
74.646 m
74.622 m
74.865 m
75.092 m
75.173 m
75.168 m
75.097 m
74.927 m
74.802 m
74.636 m
74.651 m
74.780 m
74.901 m
74.978 m
75.058 m
75.288 m
75.285 m
75.343 m
75.334 m
75.259 m
75.106 m
75.155 m
75.030 m
75.009 m
74.990 m
75.035 m
74.990 m
75.208 m
75.135 m
75.029 m
74.935 m
74.745 m
74.630 m
74.524 m
74.451 m
74.540 m
74.528 m
74.588 m
74.588 m
74.749 m
74.890 m
74.921 m
74.865 m
74.777 m
74.673 m
74.569 m
74.543 m
74.454 m
74.419 m
74.425 m
74.395 m
74.703 m
74.995 m
75.226 m
75.198 m
75.017 m
74.849 m
74.699 m
74.642 m
74.577 m
74.536 m
74.622 m
74.768 m
74.984 m
75.113 m
75.145 m
75.007 m
74.875 m
74.708 m
74.644 m
74.617 m
74.651 m
74.935 m
74.997 m
75.068 m
75.201 m
75.295 m
75.190 m
75.042 m
74.854 m
74.643 m
74.482 m
74.353 m
74.385 m
74.435 m
74.445 m
74.558 m
74.850 m
75.114 m
75.053 m
74.999 m
75.025 m
74.979 m
74.850 m
74.819 m
74.859 m
75.037 m
75.158 m
75.145 m
75.430 m
75.606 m
75.461 m
75.240 m
75.005 m
74.751 m
74.594 m
74.516 m
74.561 m
74.555 m
74.519 m
74.550 m
74.874 m
75.098 m
75.086 m
75.029 m
74.930 m
74.779 m
74.620 m
74.532 m
74.503 m
74.545 m
74.716 m
74.721 m
74.703 m
74.809 m
74.907 m
74.907 m
74.884 m
74.709 m
74.651 m
74.696 m
74.646 m
74.614 m
74.750 m
74.767 m
74.819 m
75.131 m
75.240 m
75.159 m
74.993 m
74.836 m
74.745 m
74.722 m
74.737 m
74.809 m
74.900 m
75.018 m
75.174 m
75.334 m
75.308 m
75.195 m
75.019 m
74.873 m
74.744 m
74.637 m
74.595 m
74.832 m
75.064 m
75.158 m
75.421 m
75.361 m
75.188 m
75.141 m
74.932 m
74.733 m
74.502 m
74.332 m
74.279 m
74.316 m
74.433 m
74.495 m
74.629 m
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
no value
75.054 m
74.818 m
74.610 m
74.464 m
74.467 m
74.494 m
74.548 m
74.649 m
74.844 m
74.937 m
74.999 m
74.967 m
74.822 m
74.632 m
74.521 m
74.474 m
74.517 m
74.556 m
74.681 m
74.786 m
74.983 m
75.220 m
75.335 m
75.187 m
74.910 m
74.652 m
74.491 m
74.364 m
74.317 m
74.332 m
74.294 m
74.355 m
74.738 m
74.960 m
75.132 m
75.054 m
74.990 m
74.763 m
74.635 m
74.644 m
74.734 m
74.834 m
74.754 m
74.731 m
74.896 m
75.046 m
75.154 m
75.100 m
75.025 m
74.961 m
74.703 m
74.505 m
74.557 m
74.762 m
74.873 m
74.855 m
75.054 m
75.129 m
75.033 m
74.948 m
74.798 m
74.697 m
74.616 m
74.594 m
74.563 m
74.640 m
74.861 m
74.825 m
74.838 m
74.852 m
74.890 m
74.978 m
74.940 m
74.820 m
74.741 m
74.791 m
74.829 m
74.984 m
74.968 m
74.840 m
no value
no value
74.995 m
74.864 m
74.716 m
74.560 m
74.429 m
74.308 m
74.331 m
74.563 m
74.756 m
74.880 m
75.187 m
75.308 m
75.194 m
75.125 m
75.062 m
74.818 m
74.609 m
74.516 m
74.558 m
74.778 m
74.834 m
74.944 m
75.135 m
75.210 m
75.181 m
75.132 m
75.042 m
74.803 m
74.620 m
74.524 m
74.500 m
74.519 m
74.545 m
74.565 m
74.666 m
74.723 m
74.846 m
74.968 m
74.905 m
74.708 m
74.620 m
74.505 m
74.527 m
74.494 m
74.412 m
74.623 m
74.862 m
75.235 m
75.339 m
75.141 m
74.950 m
74.776 m
74.678 m
74.584 m
74.630 m
74.807 m
74.993 m
74.979 m
74.925 m
74.926 m
74.912 m
74.792 m
74.658 m
74.504 m
74.338 m
74.300 m
74.291 m
74.389 m
74.528 m
74.583 m
74.733 m
74.891 m
75.108 m
75.146 m
74.992 m
74.793 m
74.648 m
74.596 m
74.543 m
74.643 m
74.618 m
74.557 m
74.844 m
75.151 m
75.185 m
75.096 m
74.963 m
74.780 m
74.593 m
74.461 m
74.465 m
74.562 m
74.506 m
74.414 m
74.635 m
74.824 m
75.035 m
75.220 m
75.109 m
74.911 m
74.688 m
74.569 m
74.482 m
74.632 m
74.827 m
74.985 m
75.121 m
75.095 m
75.028 m
74.947 m
74.850 m
74.713 m
74.552 m
74.489 m
74.464 m
74.630 m
74.827 m
75.018 m
75.361 m
75.810 m
75.823 m
75.697 m
75.431 m
75.091 m
74.876 m
74.872 m
74.781 m
74.842 m
74.908 m
74.938 m
75.021 m
75.270 m
75.227 m
75.079 m
74.921 m
74.756 m
74.639 m
74.628 m
74.729 m
74.836 m
74.976 m
74.977 m
75.162 m
75.711 m
75.920 m
75.810 m
75.537 m
75.255 m
75.054 m
75.045 m
75.009 m
75.067 m
75.128 m
75.196 m
75.327 m
75.377 m
75.306 m
75.187 m
75.056 m
74.864 m
74.714 m
74.609 m
74.625 m
74.639 m
74.548 m
74.500 m
74.630 m
74.736 m
74.727 m
74.825 m
74.861 m
74.799 m
74.791 m
74.869 m
74.876 m
74.877 m
74.893 m
74.999 m
75.143 m
75.187 m
75.140 m
74.956 m
74.751 m
74.561 m
74.419 m
74.409 m
74.476 m
74.666 m
74.777 m
74.893 m
75.144 m
75.375 m
75.250 m
75.150 m
75.063 m
74.893 m
74.667 m
74.499 m
74.498 m
74.606 m
74.717 m
74.744 m
74.882 m
74.971 m
74.946 m
74.987 m
74.926 m
74.796 m
74.594 m
74.422 m
74.432 m
74.477 m
74.460 m
74.560 m
74.803 m
74.976 m
75.103 m
75.043 m
74.894 m
74.743 m
74.589 m
74.494 m
74.437 m
74.555 m
74.550 m
74.708 m
75.124 m
75.383 m
75.407 m
75.364 m
75.286 m
75.111 m
no value

4 October in the last 10 years

DayLevel
74.665 m
74.705 m
74.747 m
74.435 m
74.776 m
74.765 m
75.106 m
74.678 m
74.91 m
74.619 m

Year by year

YearDays with a valueDays below the normal range
to 2750
35414
36612
3650
365102
365133
3650
3650
3640
3650
3660
365100
3655
36537
366195
36530
36073
3650
3660
313182
36547
36511
3660
36591
35797
36426
1520
11995
36572
3650
3660
36584
3650
3650
36632
36598
3650
36588
36673
36252
3650
3650
3660
3650
3650
36433
3660
3650
36511
354105
3660
3481
3650
3600
3620
36514
355103
36535
3490
3658

Records

  • Highest daily average in our series since 1 January 1967: 75.939 m on 12 June 2019.
  • Lowest daily average in our series since 1 January 1967: 74.237 m on 4 January 1999.

See also