Themse water temperature

Themse, Ham & Kingston · River

The current water temperature at Themse is 19.8 °C (as of September 15, 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.

19.8 °C

Measured: September 15, 2026 · continuously updated

💧 Water 19.8° · ☀️ Air 12.9° · high today 15.4°

Temperature trend of recent weeks

Themse — Photo: Basher Eyre · CC BY-SA 2.0 · Wikimedia Commons

Nearby waters

Thames, Brentford Barge · 5.9 km away17.7 °C Thames, Kew Barge · 6.8 km away17.4 °C Thames, Chiswick Pier · 7.4 km away16.9 °C Thames, Putney · 8.0 km away16.5 °C Thames, Hammersmith · 8.8 km away16.7 °C

More measuring points: Themse

Wallingford17.8 °C Pangbourne17.6 °C Wolvercote17.2 °C

Frequently asked questions

Can you swim at Themse right now?
The current water temperature is 19.8 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Themse?
Currently 19.8 °C (updated continuously).

← All waters · Warmest rivers today · Water temperature in United Kingdom