Built for people who check the forecast every morning, not once a season.
Highs, lows and the full curve for any date, with local time and height in metres or feet.
Combine swell, wind direction and tide state into one rule per spot.
Forty thousand spots worldwide, plus custom coordinates on paid plans.
Forecasts sync in the background so the app opens with data, not a spinner.
Two years of past conditions on Crew, ten on Harbour.
CSV on every plan. Rate-limited JSON API with an example client on Crew and above.
Tide predictions are computed from harmonic constituents published by national hydrographic offices. Swell and wind come from global spectral wave models, downscaled where local bathymetry is available. Model runs land four times a day and we publish within twenty minutes of each run.
Tideline