Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
Photo: Eirian Evans / Wikimedia Commons · CC BY-SA 2.0
Today at Ynys Dinas: Good for swimming — 77/100 for expert level. Wind 6 kn E · Tide -1.0 to 0.1 m. Best window around 02:00 UTC. Today's conditions at Ynys Dinas: 0.7m waves with light cross-shore wind. Kite Foiling looks Epic! in the midday, with E-Foiling also worth considering. Water temperature is 15°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.
Ynys Dinas faces NE, tucked away from the prevailing westerly swell — the aspect that gives swimming the flat, sheltered water it needs more often than an exposed coast would.
Today's wind is cross-shore at 6 kn. Light enough that the surface should stay workable for swimming.
Over the published window Ynys Dinas clears 60/100 for swimming at Intermediate, Advanced, Expert levels — that is who this spot is for on this sport. Today, 6 of 10 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Ynys Dinas ranks 12th for swimming. 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, secluded sand-and-shingle cove on the sheltered flank of a headland, backed by cliffs, rocks and a stone sea wall, with rock pools at lower tides. The sheltered aspect gives calm, flat water suited to kayaking, small-boat launching and bathing rather than surf or wind sports; a local boat club uses the slipway. At high tide the beach is almost entirely covered, reaching the sea wall; lower tides expose more sand. No lifeguard cover.
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Get the free Ynys Dinas widgetToday's conditions for Ynys Dinas 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 Ynys Dinas today: 6 kn E (gusting 21 kn). Wind direction relative to the shore affects swimming 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 Ynys Dinas today: 0.8 m, 6 s period from W, peeling 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 swimming at Ynys Dinas today is around 18:00 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, Ynys Dinas scores 78/100 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.
Ynys Dinas 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.
Ynys Dinas is a coastal location near Cwm-yr-Eglwys in United Kingdom. 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 Ynys Dinas, 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.
