Fetching this spot's conditions…
Tip of the moment
Fetching this spot's conditions…
Tip of the moment
Lanton · Nouvelle-Aquitaine
Today's take
Favorable window: 18:00–20:00.
Water temperature
20.1 °C
Verdict
Pleasant
Underwater visibility
~2.6 m
satellite reading from 2 days ago
When to go
Good from 18:00 to 20:00.
Pin colours:swimmablecautionnot advisedconditions not loaded yet
Forecasts come from ~8 km resolution models: very local effects (a sheltering pier, a lagoon pass) are not captured.
Sea-state data comes from a marine model cell about 13.0 km from this point — local nearshore conditions can differ.
Wave heights are significant heights: individual waves up to 2× this height still occur.
Four wave models are compared for this point: EWAM, GWAM, Météo-France WAM and ECMWF WAM.
Tide times derived from modelled sea level (± a few tens of minutes) — not official tide tables.
Missing data is shown as missing — never silently estimated.
Beach locations from OpenStreetMap — © OpenStreetMap contributors (ODbL).
Weather and marine data: Open-Meteo.com (CC BY 4.0), wave models from the Deutscher Wetterdienst (CC BY 4.0). Forecasts are not guarantees. · Data fetched at 05:48 UTC
Water clarity generated using E.U. Copernicus Marine Service Information.
Windows, comfort score and verdicts are computed by oswim from this data — modified values, not the institutes' raw figures.
min 4 · max 13 km/h · north-east sector · gusts 23 km/h
Visibility · 55 km
Good visibility.
Loss of bearings and collision risk
Post-rain pollution · 0 mm over 24 h
When it rains hard, runoff from roads and fields and sewer overflows carry bacteria out to sea. Nothing significant has fallen in the last 24 hours.
Official sampling is weekly at best; between two samples, recent rain is the recognized warning signal (EEA)
Jellyfish: no recent info. If you're there, tell us what you see — even “none” helps the next swimmer.
Depth as you head out: 200 m → 0.7 m · 400 m → 0.1 m
Modelled depths (EMODnet, the European seabed model), stated without the tide: at low water there is less. A swimming bearing, never a navigation aid.
Easy access from the Lanton waterfront, with a dedicated swimming area.
Worth knowing
The Bassin d'Arcachon is home to a varied fauna typical of tidal flats, from cockles to Pacific oysters, reflecting the bay's centuries-old oyster-farming heritage.
Spot profile pending on-site verification.