Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Photo: Rundvald / Wikimedia Commons · CC BY-SA 4.0
Today at Plage Saint-Sieuc: Okay for kite surfing — 63/100 for intermediate level. Wind 6 kn SE · Waves 1.1 m, 10 s · Tide -2.1 to 1.3 m. Best window around 04:00 UTC. Today's conditions at Plage Saint-Sieuc: 0.6m waves with light cross-shore wind. Kite Foiling looks Epic! in the midday, with E-Foiling also worth considering. Water temperature is 17°C / 62°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.
Plage Saint-Sieuc faces N, and that aspect decides whether the day's wind arrives clean off the water or broken up by the land — which matters more for kite surfing than the forecast speed alone.
Today's wind is cross-shore at 6 kn. Straight cross-shore is the classic kite surfing direction: it lets you hold a line along the beach rather than fighting to get back to it.
Over the published window Plage Saint-Sieuc clears 60/100 for kite 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, 1 of 10 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Plage Saint-Sieuc ranks 26th for kite 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, NNW-facing sandy bay of about 1.2 km with a large shallow sandy plateau, mixed sand and pebble with rocky outcrops at its eastern end, offering calm freeride kite/windsurf and SUP water with occasional small waves rather than a surf break. All navigation, including kitesurf, is banned 1 July-31 August; the back of the bay is a bird reserve closed late October-31 March. Dogs allowed only October-May. Lifeguards staff the beach 2 July-31 August.
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Wind at Plage Saint-Sieuc today: 6 kn SE (gusting 18 kn). Wind direction relative to the shore affects kite 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 Saint-Sieuc today: 1.1 m, 10 s period from NW, 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 kite surfing at Plage Saint-Sieuc today is around 04:00 UTC, when conditions score 63/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Plage Saint-Sieuc scores 77/100 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.
Plage Saint-Sieuc 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 Saint-Sieuc is a coastal location near Lancieux 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 Saint-Sieuc, 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.
