Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Today at Plage du Gros Jonc: Epic! for kite foiling — 95/100 for expert level. Wind 9 kn W · Waves 0.4 m, 17 s · Tide -1.3 to 0.4 m. Best window around 14:00 UTC. Today's conditions at Plage du Gros Jonc: 0.4m waves with light offshore wind. Kite Foiling looks Epic! in the midday, with Wing Foiling 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.
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 sandy, sports-oriented beach on the island's northern tip, facing NE over a tidal strait. A sailing club runs a watersports zone for kitesurfing, wingfoiling, windsurfing, sailing, kayak, SUP and e-foil. Sandy seabed with some large stones; fish weirs sit at the point. Water recedes dramatically at low tide, making swimming impossible then - best entry is mid-rising tide to high tide. Lifeguarded in season; parking is very limited.
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Plage du Gros Jonc scores 46/100 today for surfing at intermediate level — Okay. Wind 9 kn W · Waves 0.4 m, 17 s · Tide -1.3 to 0.4 m. Best window around 20:00 UTC. Scores are updated hourly by 4Shor ShorSense™.
Wind at Plage du Gros Jonc today: 9 kn W (gusting 27 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 Plage du Gros Jonc today: 0.4 m, 17 s period from N, mushy 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 Plage du Gros Jonc today is around 20:00 UTC, when conditions score 46/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Plage du Gros Jonc scores 90/100 today for kite foiling — Epic!. 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.
Plage du Gros Jonc 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.
Plage du Gros Jonc is a coastal location near La Vigne de la Redoute 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 Plage du Gros Jonc, 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.
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