About this swim spot
Derwent Water (Keswick) is a lake on the ENG coast and one of around 2,000 UK swim spots Hattie Knows monitors continuously. Lake conditions are dominated by wind, water temperature and any blue-green algae alerts. Hattie aggregates the local-authority and Environment Agency feeds.
Every Hattie verdict combines direct ingest from all 12 UK water companies' Event Duration Monitoring feeds, EA / NRW / SEPA / DAERA bathing-water samples, Met Office and Open-Meteo forecasts, UKHO tide tables, and live flood warnings — fused into a single read of whether it is safe to swim right now.
Nearby swim spots
- Derwent Water at Crow Park 0.9 km away
- Buttermere 9.7 km away