River Thames at St Johns Lock
The River Thames at St Johns Lock read 0.09 m at .
- Newest reading
- 0.09 mProvisional
- Change
- -0.001 m in a day
- +0.007 m in a week
That is within the typical range of -0.011 m to 0.25 m that the Environment Agency gives for this station.
The last 90 days
- Level
- Our record
Table: The last 90 days
| Day | Daily average (m) |
|---|---|
| no value | |
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| no value | |
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| no value | |
| 0.106 m | |
| 0.103 m | |
| 0.102 m | |
| 0.093 m | |
| 0.098 m | |
| 0.111 m | |
| 0.132 m | |
| 0.108 m | |
| 0.092 m | |
| 0.090 m | |
| 0.094 m | |
| 0.100 m | |
| 0.093 m | |
| 0.089 m | |
| 0.087 m | |
| 0.085 m | |
| 0.083 m | |
| 0.083 m | |
| 0.084 m | |
| 0.087 m | |
| 0.087 m | |
| 0.086 m | |
| 0.082 m | |
| 0.083 m | |
| 0.085 m | |
| 0.092 m | |
| 0.091 m | |
| 0.095 m | |
| 0.105 m | |
| 0.097 m | |
| no value | |
| no value |
Normal range and official levels
- Typical range, low: -0.011 m. The newest reading is 0.101 m above it.Set by This uses Environment Agency flood and river level data from the real-time data API (Beta).
- Typical range, high: 0.25 m. The newest reading is 0.16 m below it.Set by This uses Environment Agency flood and river level data from the real-time data API (Beta).
Records
- Highest reading in our series since 2 October 2025: 0.193 m at 05:15 BST on 5 October 2025. Provisional data.
- Lowest reading in our series since 2 October 2025: 0.071 m at 15:15 BST on 26 September 2026. Provisional data.
- Highest daily average in our series since 2 October 2025: 0.179 m on 5 October 2025. Provisional data.
- Lowest daily average in our series since 2 October 2025: 0.082 m on 26 September 2026. Provisional data.
As the source publishes them
- Lowest on record: -0.265 m, on 20 March 2008.Set by This uses Environment Agency flood and river level data from the real-time data API (Beta).
- Highest in recent years: 0.776 m, on 16 January 2008.Set by This uses Environment Agency flood and river level data from the real-time data API (Beta).
- Highest on record: 0.945 m, on 23 November 1995.Set by This uses Environment Agency flood and river level data from the real-time data API (Beta).
About this gauge
St Johns Lock is a gauge on the River Thames in the United Kingdom.
It lies at 51.6893° N, 1.6788° W.
Its readings come from the Environment Agency.
The gauge reads the height of the water above a fixed zero, not the depth of the river.
The Environment Agency says its real-time data should not be relied upon for safety critical applications.
The newest reading is provisional: the source may still correct it.