About this swim spot
Portland Harbour Castle Cove is a sea swim spot on the England coast and one of around 2,000 UK swim spots Hattie Knows monitors continuously. Tide times, wave height and water temperature shape every sea swim — Hattie pulls all three from official UK Hydrographic Office and Met Office 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
- Chesil Cove, Portland 2.2 km away
- Chesil Cove 2.9 km away
- Weymouth Lodmoor 3.5 km away
- Bowleaze Cove 5.2 km away
- Little Beach 6.1 km away