Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Photo: JackyM59 / Wikimedia Commons · CC BY-SA 4.0
Today at Grande Plage: Excellent for wing foiling — 86/100 for intermediate level. Wind 8 kn SW · Waves 0.9 m, 14 s · Tide -1.3 to 0.4 m. Best window around 19:00 UTC. Today's conditions at Grande Plage: 0.8m waves with light onshore wind. Kite Foiling looks Epic! in the late morning, with Wing Foiling also worth considering. Water temperature is 16°C / 61°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.
Grande Plage faces SW, open to the prevailing westerlies, so the wind arrives off the water rather than filtered through the land — the clean, steady flow wing foiling wants, and the reason gusts here are sea breezes rather than land turbulence.
Today's wind is onshore at 8 kn. Onshore is the safest direction for wing foiling here — anything that goes wrong drifts you back to the beach — at the cost of a choppier surface.
Over the published window Grande Plage clears 60/100 for wing foiling at Intermediate, Advanced, Expert levels — that is who this spot is for on this sport. Today, 8 of 10 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Grande Plage ranks 9th for wing foiling. 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 wide, fine-sand Atlantic beach break over 3 km long, facing west-southwest and exposed to Bay of Biscay swell, used for surfing, kitesurfing and windsurfing. During the supervised season, surf, longboard and kitesurf activity is confined to a zone at the southern 'Passerelle' end. Strong rip currents (baines) are the main hazard, carrying an official municipal warning about dangerous currents. Best surf entry is at low to mid tide.
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Wind at Grande Plage today: 8 kn SW (gusting 30 kn). Wind direction relative to the shore affects wing foiling 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 Grande Plage today: 0.9 m, 14 s period from W, closing 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 wing foiling at Grande Plage today is around 19:00 UTC, when conditions score 86/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Grande Plage scores 73/100 today for surfing — Good. 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.
Grande Plage 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.
Grande Plage is a coastal location near Saint-Gilles-Croix-de-Vie 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 Grande Plage, 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.
