Derwentwater water temperature

Derwentwater, Keswick · Lake

The current water temperature at Derwentwater is 17.3 °C (as of August 21, 2026, source: official monitoring networks).

Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.

17.3 °C

Measured: August 21, 2026 · continuously updated

💧 Water 17.3° · ☀️ Air 12.5° · high today 14.3°

Temperature trend of recent weeks

Derwentwater — Photo: Slbs · CC BY-SA 2.0 · Wikimedia Commons

Measurement series & statistics

This measurement series includes 8 data points since July 3, 2026.

Lowest recorded value: 17.3 °C on August 21, 2026 · highest value: 21.5 °C on August 11, 2026.

Nearby waters

Coniston Water, Monk Coniston · 25.5 km away19.2 °C Coniston Water, Coniston · 26.1 km away19.1 °C Irish Sea, Allonby at West Windsallerdale Mbc · 26.9 km away20.2 °C Windermere, Miller Ground · 27.7 km away19.8 °C Windermere, Rayrigg Meadow · 28.0 km away19.6 °C

Frequently asked questions

Can you swim at Derwentwater right now?
The current water temperature is 17.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at Derwentwater?
Currently 17.3 °C (updated continuously).

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