Fetching this spot's conditions…
Tip of the moment
Fetching this spot's conditions…
Tip of the moment
Groix · Bretagne
Today's take
Best window: 17:00–20:00. Excellent conditions.
Water temperature
18.4 °C
Verdict
Pleasant
Underwater visibility
~4.7 m
satellite reading from yesterday
When to go
Good from 17:00 to 20:00 — best around 17:00.
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.
The sea state is read as close to the beach as the model allows, without our having verified that this water is the water at the shore (indented coast, ria, head of a bay). Take it as an order of magnitude: what comes in from open sea may not reach this far.
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 15:54 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 8 · max 19 km/h · east sector · gusts 28 km/h
Visibility · 38 – 41 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.
In all cases: bright swim cap and tow float so boats can see you.
Consolidated ladder: World Aquatics / World Triathlon / FFTri rules + manufacturer thermal guides
Nearest lifeguarded beach: (8.2 km).
Reached via the coastal footpath along the island's south shore, on foot from nearby hamlets.
Worth knowing
The waters around Groix, home to crabs and lobsters among the rocks, are occasionally visited offshore by basking sharks during their summer migrations.
Spot profile pending on-site verification.