Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Today at Castricum aan Zee: Good for windsurfing — 73/100 for intermediate level. Wind 10 kn E · Waves 0.6 m, 11 s · Tide -1.3 to 0.0 m. Best window around 20:00 UTC. Today's conditions at Castricum aan Zee: 0.3m waves with moderate offshore wind. Kite Foiling looks Excellent in the afternoon, with E-Foiling also worth considering. Water temperature is 16°C / 60°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.
Castricum aan Zee faces NW, open to the prevailing westerlies, so the wind arrives off the water rather than filtered through the land — the clean, steady flow windsurfing wants, and the reason gusts here are sea breezes rather than land turbulence.
Today's wind is cross-offshore at 10 kn. Leaning offshore, so a failure drifts you away from the beach rather than back to it — rideable for windsurfing, but not the direction to push your luck in.
Over the published window Castricum aan Zee clears 60/100 for windsurfing 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, 10 of 10 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Castricum aan Zee ranks 12th 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 dune-backed North Sea beach with a sandy break on shifting sandbars, rated for advanced riders; sideshore wind gives cleanest conditions, onshore wind brings larger, messier shorebreak. A submerged shipwreck lies in the north kite zone. Kitesurfing and windsurfing run year-round except in front of the pavilions. Blue Flag status. A volunteer brigade with a rescue boat and jetski covers May–mid-September; sandbars are shallower and choppier at low tide.
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Wind at Castricum aan Zee today: 10 kn E (gusting 20 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 Castricum aan Zee today: 0.6 m, 11 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 windsurfing at Castricum aan Zee today is around 20:00 UTC, when conditions score 73/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Castricum aan Zee scores 74/100 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.
Castricum aan Zee 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.
Castricum aan Zee is a coastal location near Strandslag 38 in Netherlands. 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 Castricum aan Zee, 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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