Fetching this spot's conditions…
Tip of the moment
Fetching this spot's conditions…
Tip of the moment
Île-d'Arz · Bretagne
Today's take
Best window: 17:00–20:00. Excellent conditions.
Water temperature
20.1 °C
Verdict
Glassy
Underwater visibility
~5.0 m
satellite reading from 2 days ago
When to go
Good from 17:00 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.
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 12:26 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 17 km/h · north-east sector · gusts 29 km/h
Visibility · 41 – 54 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.
Modelled depths (EMODnet, the European seabed model), stated without the tide: at low water there is less. A swimming bearing, never a navigation aid.
Do you know whether this beach is lifeguarded?
Nearest lifeguarded beach: (8.6 km).
The slipway is reached on foot from the village on Île-d'Arz, itself accessible by boat from Vannes or Séné.
Worth knowing
The gulf's calm waters shelter a quietly rich marine life, from green crabs to cuttlefish and starfish sometimes spotted near the rocks.
Spot profile pending on-site verification.