Themse water temperature

Themse, Ham & Kingston · River

The current water temperature at Themse is 21.7 °C (as of August 21, 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.

21.7 °C

Measured: August 21, 2026 · continuously updated

💧 Water 21.7° · ☀️ Air 15.1° · high today 20.3°

Temperature trend of recent weeks

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

Measurement series & statistics

This measurement series includes 8 data points since July 9, 2026.

Lowest recorded value: 21.7 °C on August 21, 2026 · highest value: 24.9 °C on July 9, 2026.

Nearby waters

The Serpentine · 13.1 km away23.8 °C Hampstead Heath Mixed Pond · 17.9 km away22.4 °C Hampstead Heath Mens Pond · 18.5 km away22.8 °C Hampstead Heath Ladies Pond · 18.7 km away21.8 °C Frensham Great Pond · 44.9 km away25.6 °C

More measuring points: Themse

Pangbourne23.1 °C Wallingford23.0 °C Wolvercote20.8 °C

Frequently asked questions

Can you swim at Themse right now?
The current water temperature is 21.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Themse?
Currently 21.7 °C (updated continuously).

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