Themse water temperature
Themse, Wallingford · River
The current water temperature at Themse is 18.0 °C (as of September 11, 2026, source: official monitoring networks).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 10 data points since July 29, 2026.
Lowest recorded value: 18.0 °C on September 11, 2026 · highest value: 23.2 °C on July 29, 2026.
In September, temperatures have ranged between 18.0 °C and 19.7 °C.
The current value is 0.8 °C below the September average of this series.
Nearby waters
More measuring points: Themse
Frequently asked questions
Can you swim at Themse right now?
The current water temperature is 18.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Themse?
Currently 18.0 °C (updated continuously).
How warm is at Themse in September?
In September, the water temperature recently averaged 18.8 °C.
