Live wave height, wind and water temp — plus an 8-day forecast scored 0–100 for every sport.
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Today at Port Marsh: Excellent for surfing — 84/100 for advanced level. Wind 6 kn SE · Waves 1.6 m, 14 s · Tide -0.9 to 0.2 m. Best window around 22:00 UTC. Today's conditions at Port Marsh: 1.3m waves with light offshore wind. Kite Foiling looks Good in the midday, with Paddleboarding also worth considering. Water temperature is 13°C / 56°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.
Port Marsh faces NW, straight into the prevailing Atlantic swell window — the reason it has waves at all, and the reason it is rarely flat.
Today's wind is offshore at 6 kn. That is the direction you want for surfing — it holds the face up and clean instead of crumbling it.
Over the published window Port Marsh clears 60/100 for surfing at Intermediate, Advanced, Expert levels — that is who this spot is for on this sport. Today, 0 of 9 daylight hours clear that line at Intermediate.
Among the 31 scored spots within reach today, Port Marsh is the best of them for surfing — so if you are travelling for it, this is the one.
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 remote, scenic beach with a broad sandy strand facing north-west, beside a ferry pier at the edge of a protected bay. Left of the pier, a left-hand reef/point break works at all tide stages on a north-north-west swell with a south offshore wind, though the reef has exposed rocks and summer is usually flat. Popular with surfers, windsurfers and kitesurfers. No lifeguard service; rip currents are present and signposted.
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Get the free Port Marsh widgetToday's conditions for Port Marsh 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 Port Marsh today: 6 kn SE (gusting 12 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 Port Marsh today: 1.6 m, 14 s period from N, hollow 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 Port Marsh today is around 04:00 UTC, when conditions score 97/100 for intermediate level. Conditions can shift by the hour — the 4Shor app shows the full 24-hour score chart.
For beginners, Port Marsh scores 44/100 today for surfing — Poor. 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.
Port Marsh 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.
Port Marsh is a coastal location near Machaire Rabhartaigh in Ireland. 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 Port Marsh, 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.
