Thames water temperature
Thames, Chiswick Pier · River
The current water temperature at Thames is 19.1 °C (as of September 20, 2026, source: Environment Agency).
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 388 data points since September 1, 2026.
Lowest recorded value: 19.0 °C on September 19, 2026 · highest value: 21.7 °C on September 6, 2026.
In September, temperatures have ranged between 19.0 °C and 21.7 °C.
The current value is 1.3 °C below the September average of this series.
Nearby waters
More measuring points: Thames
Frequently asked questions
Can you swim at Thames right now?
The current water temperature is 19.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Thames?
Currently 19.1 °C (updated continuously).
How warm is at Thames in September?
In September, the water temperature recently averaged 20.4 °C.
