Derwentwater, Keswick · Lake
The current water temperature at Derwentwater is 18.1 °C (as of July 3, 2026, source: official monitoring networks).
Can you swim at Derwentwater right now?
The current water temperature is 18.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Derwentwater?
Currently 18.1 °C (updated continuously).