Fetching this spot's conditions…
Tip of the moment
Fetching this spot's conditions…
Tip of the moment
Arzon · Bretagne
Today's take
No favorable window.
Water temperature
13.2 °C
Verdict
Sea to avoid
Underwater visibility
~2.1 m
satellite reading from 2 days ago
When to go
No favorable window that day.
No favorable window that day.
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 10.2 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 17:33 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 10 · max 37 km/h · west sector · gusts 79 km/h
Visibility · 39 km
Good visibility.
Loss of bearings and collision risk
Post-rain pollution · 3.9 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.
Water quality · Good · 2025 season
Computed from the samples of the last four bathing seasons. It says what the water here has been, not what it is today: after heavy rain, even an excellent beach degrades for a day or two.
Health authority classification (EU directive 2006/7/EC), published once per bathing season
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
Depth as you head out: 25 m → 1.8 m · 50 m → 1.8 m · 100 m → 1.8 m · 200 m → 2.4 m · 400 m → 3.6 m · 800 m → 3.6 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.
Reachable on foot from a nearby car park via a coastal path leading down to the beach.
Worth knowing
The rocky and sandy seabeds along this stretch of the Gulf of Morbihan shelter a discreet but varied marine life, from small crustaceans to burrowing shellfish.
Spot profile pending on-site verification.