Tidal data from UK Admiralty API where available; harmonic model as fallback. Water temp uses a same-coast CCO observation where available; otherwise it is Open-Meteo sea-surface temperature from the nearest sea forecast grid cell, with local swim readings used to calibrate where available. Water quality uses Environment Agency bathing-water data where available; nearby non-designated swim spots use the nearest official bathing-water sampling point. Not a safety forecast. Check wind, waves, currents, water quality, and your own ability before swimming. Privacy-friendly analytics — no cookies, no tracking. Created for fun by @wine.husband
