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, so treat it as an estimate rather than a beach thermometer. 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
