The tide at your beach,
not the nearest station's.
Most tide services point you at a tide station that might be 40 km away, behind a headland, or missing entirely. We compute the tide itself — for any point on any coastline on Earth, any date past or future — from FES2022, the newest generation of the global ocean-tide atlas built on three decades of satellite data.
⚠️ Informational use only — not for navigation or safety-of-life decisions. Heights are astronomical tide from a global model: they exclude weather-driven surge, seiches and river flow, which can move real water levels by a metre or more. Do not use them for navigation, passage planning, under-keel or bar-crossing decisions. Use official tide tables for anything depth-critical. Safe use & disclaimers →
We checked our homework — publicly
We ran our predictions head-to-head against the services people already trust on the Irish coast. At Fenit, Co. Kerry, compared with predictions built on the Marine Institute's official tide gauges, our high-water times matched to within about five minutes across three full days — and heights tracked within roughly the width of your hand. At Cork, timings agreed with a leading tide site within minutes; where we disagreed about the size of the tide, the official harbour figures sided with us. Same engine, every coastline on Earth.
Who builds on it
Fishing & angling apps
Tide turn is bite time. Give users the window at their exact mark — any coastline in the world — with moon phase for solunar scoring in the same response. Starter / Pro tier.
Coastal photography
Golden hour is only half the shot. One call returns low tide, sunset, blue hour and moon phase together, so the sand bars and reflections line up. Starter tier.
Surf, kayak & paddle
Session planning around tide state at the actual break or launch point — not the harbour 20 km down the coast. Starter / Pro tier.
Tidal walks & guides
Crossing windows for causeways, tidal islands and sand flats, months ahead — trip planners and guidebooks publish a season in one batch. Pro tier.
Drone & field operations
Schedule shoots, surveys and shore work around water level, daylight and tide in a single response per day. Pro / Business tier.
Research & coastal planning
Decades of tide history or forecast for any shoreline without per-station licensing; harmonic constants available for offline work. Pro / Business tier.
One call: tide + light + moon
curl -H "Authorization: Bearer $THIRDTRAIL_KEY" \
"https://thirdtrail.life/v1/tides/window/?lat=52.271&lon=-9.863&elevation=214&days=3&tz=Europe/Dublin"Fenit pier, three days ahead. Each day carries high/low waters plus sunrise, sunset, twilight, golden/blue hour and moon phase — the whole coastal plan in one response. Plain heights and extremes are one endpoint each; see the docs.
The light half is elevation-corrected, which matters
more on a coast than anywhere else: shoot from a 214 m sea cliff
and sunrise arrives about three minutes earlier than at the water’s
edge, moving every golden- and blue-hour boundary with it. Pass
elevation and you get the light for where you are actually
standing. Tide heights are unaffected — the ocean does not care how high
you are.
Any date works
Because it's a model, not a station table, past reconstruction and far-future planning cost the same one call — no 7-day horizon, no per-window fees. Plan next season's spring-tide shoots today.
Start using it
Tide model: FES2022 — produced by LEGOS, NOVELTIS and CLS, funded by CNES, distributed by AVISO.