Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Photo: Olaf Tausch / Wikimedia Commons · CC BY 3.0
Today at Cala Mercè: Good for windsurfing — 72/100 for intermediate level. Wind 5 kn W · Waves 1.0 m, 6 s · Tide -0.4 to -0.2 m. Best window around 11:00 UTC. Today's conditions at Cala Mercè: 0.9m waves with light cross-shore wind. Kite Foiling looks Epic! in the midday, with E-Foiling also worth considering. Water temperature is 24°C / 76°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.
Cala Mercè 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 windsurfing than the forecast speed alone.
Today's wind is cross-shore at 5 kn. Straight cross-shore is the classic windsurfing direction: it lets you hold a line along the beach rather than fighting to get back to it.
Over the published window Cala Mercè clears 60/100 for windsurfing at Intermediate, Advanced, Expert levels — that is who this spot is for on this sport. Today, 5 of 11 daylight hours clear that line at Intermediate.
Among the 30 scored spots within reach today, Cala Mercè ranks 5th for windsurfing. 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 small, largely undocumented north-facing cove sitting outside the local marine reserve boundary. The wider coastline here mixes sand with gravel and rocky sections, with coarse, pebbly entries typical of neighbouring coves. The north-facing orientation exposes it to northerly wind-driven chop rather than any organised surf break, best suited to calm-water swimming and snorkelling in settled conditions. No lifeguard or tow service is documented here.
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Get the free Cala Mercè widgetToday's conditions for Cala Mercè 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 Cala Mercè today: 5 kn W (gusting 23 kn). Wind direction relative to the shore affects windsurfing 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 Cala Mercè today: 1.0 m, 6 s period from S, 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 windsurfing at Cala Mercè today is around 11:00 UTC, when conditions score 72/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Cala Mercè scores 54/100 today for kite surfing — Okay. 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.
Cala Mercè 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.
Cala Mercè is a coastal location near Colònia de Sant Pere in Spain. 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 Cala Mercè, 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.
