Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Today at Sur une île: Excellent for surfing — 89/100 for beginner level. Wind 8 kn W · Waves 0.6 m, 13 s · Tide -1.3 to 0.4 m. Best window around 18:00 UTC. Today's conditions at Sur une île: 0.5m waves with light cross-shore wind. Kite Foiling looks Epic! in the midday, with Surfing also worth considering. Water temperature is 17°C / 63°F.
Forecast updated · ShorSense™
Today plus the next two days are free for everyone — scored in 3-hour windows, just like the app. The full 8-day forecast lives in the 4Shor app.
Sur une île faces N. Which swells reach it — and therefore whether there is anything worth riding — depends on that aspect more than on the open-ocean forecast height.
Today's wind is cross-shore at 8 kn. Straight cross-shore sits between the two for surfing — the face stays rideable but the wall is less organised than on a clean offshore.
Over the published window Sur une île clears 60/100 for surfing at every ability from Beginner to Expert — an unusually broad spot, which normally means a range of conditions rather than one narrow sweet spot. Today, 7 of 10 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Sur une île ranks 7th for surfing. The order changes by discipline: the same conditions that put a spot top for one sport can drop it down the list for another.
Satellite-derived bathymetry with 10 m pixels and 10 cm vertical resolution out to ~40 m depth. The shape of the seabed is what determines where and how waves break.
Most apps run a single global model at 9–25 km. We blend regional NWP from national meteorological offices at 1.3–2 km — UK Met Office UKV, Météo-France AROME HD, ItaliaMeteo ICON-2I — with ECMWF IFS for the 8-day horizon. Finer resolution means the sea breeze, cliff funnelling and bay shadowing that changes everything for a session.
A nearshore wave model propagates the spectrum across the bathymetric mesh — modelling refraction, shoaling, dissipation, focusing and breaking as it goes. Most apps stop at swell + wind. We go further.
10 sport models × 4 ability levels weight wave height, period, wind, tide and breaking conditions differently — calibrated against ridden sessions so the scores mean what they say.
A sheltered, north-northeast-facing bay, launch point for a guided kayak, paddleboard and sailing operator running year-round. The sandy-bottomed bay is naturally protected from Atlantic swell, with a calm lagoon zone at low tide — flatwater terrain for paddling rather than surfing or kite/windsurfing. Tidal flats and channels are exposed at low water, with currents near the port channel. Bathing is unsupervised, no lifeguard post; dogs banned in summer.
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Get the free Sur une île widgetToday's conditions for Sur une île are free. Unlock the full 8-day forecast and per-sport alerts that ping you when this location is about to fire. more than 2,500 European locations, scored from the seabed up.
Wind at Sur une île today: 8 kn W (gusting 25 kn). Wind direction relative to the shore affects surfing conditions significantly — offshore winds produce cleaner, glassier surfaces while onshore winds add chop. These are daily averages; the 4Shor app shows hourly detail.
Waves at Sur une île today: 0.6 m, 13 s period from NW, peeling character. 4Shor derives nearshore wave conditions from ECMWF IFS 9-km atmospheric data and the IBI regional ocean model, updated hourly.
The best window for surfing at Sur une île today is around 18:00 UTC, when conditions score 64/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Sur une île scores 89/100 today for surfing — Excellent. A score of 65–79 is Good for a beginner; 80+ is Excellent (90+ is Epic!); below 45 the session is usually not worth it. 4Shor scores every location across Beginner, Intermediate, Advanced and Expert levels.
Sur une île is scored for Surfing, Windsurfing, Kite Surfing, Kite Foiling, Wing Foiling, E-Foiling, Paddleboarding, Swimming, Kayaking, Canoeing in the 4Shor forecast system. Conditions are rated Beginner through Expert for each sport, updated every hour, so you always know whether the session is worth the drive.
Sur une île is a coastal location near Saint-Denis-d'Oléron in France. It is one of more than 2,500 European water-sport locations scored daily by 4Shor.
4Shor's ShorSense™ system combines satellite-derived seafloor mapping, nearshore wave models, wind and tide data to generate a hyper-local forecast. At Sur une île, conditions are scored hourly on a 0–100 scale for each sport and ability level. A score of 80+ means Excellent (90+ Epic!); 65–79 is Good; below 45 the session is usually not worth the drive.
Questions about 4Shor itself — accuracy, pricing, the free trial — are answered on the FAQ page.
