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Porth Dinllaen Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Dinllaen surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 12 pm Sunday 17 May 2026 BSTForecast update in hr min s Forecast update imminent
Porth Dinllaen surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porth Dinllaen sea temperature is
11.7° C
(Which is slightly warmer than usual)How big are the waves at Porth Dinllaen today?
The current surf forecast for Porth Dinllaen at 4PM is: 1.1m 5s primary swell from a Southwest direction and 0.1m 4s secondary swell from a Northwest direction (forecast issued at 12:00pm May 17). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 3ft (0.9m) | 5s |
| Afternoon (17 May) | 3ft (0.9m) | 5s |
| Evening (17 May) | 3.5ft (1.0m) | 5s |
Table - waves today at Porth Dinllaen. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 21mm), heaviest during Mon night. Very mild (max 12°C on Mon night, min 9°C on Sun morning). Winds increasing (light winds from the SW on Sun night, strong winds from the SW by Tue afternoon). | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
WSW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 5 | SW 6 | SSW 6 | SSW 7 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 9 | |
35 | 23 | 47 | 60 | 55 | 42 | 49 | 46 | 30 | 42 | 19 | 15 | 5 | 18 | 52 | 149 | 154 | 226 | 457 | 483 | 617 | 528 | 669 | 548 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross | cross | cross | cross-on | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross | cross | |
High Tide | 9:23AM4.03m | 9:45PM4.03m | 10:10AM3.99m | 10:30PM4.04m | 10:57AM3.83m | 11:17PM3.95m | ||||||||||||||||||
Low Tide | 4:32PM0.06m | 4:56AM-0.01m | 5:19PM0.14m | 5:46AM0.00m | 6:08PM0.30m | 6:39AM0.09m | ||||||||||||||||||
 |  |  | |  |  |  |  | | | | | | | | | | | | | | | |  | |
 | 5:18 | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — |
 | — | — | — | 9:12 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:15 | — | — | — | 9:15 |
— | — | 1 | 1 | 1 | 1 | — | 1 | — | — | — | — | 1 | 1 | 4 | 4 | — | — | — | — | 3 | 2 | 1 | — | |
Temp °C | 9 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 |
4 | 4 | 4 | 4 | 4 | 4 | 6 | 6 | 6 | 6 | 7 | 6 | 6 | 4 | 3 | 6 | 7 | 5 | 3 | 4 | 4 | 5 | 6 | 5 | |
Swell 1 Height (m) Direction Period (s) | W 12 | NW 4 | NW 4 | — | W 12 | W 12 | SW 6 | SW 6 | — | SW 6 | SW 6 | WSW 6 | SW 6 | SW 5 | SW 6 | — | — | — | — | — | — | — | — | — |
 kJ | 3 | 5 | 1 | — | 3 | 3 | 49 | 46 | — | 42 | 19 | 15 | 5 | 18 | 52 | — | — | — | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | W 12 | — | — | — | — | WNW 4 | WNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 3 | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 | — | NW 4 | SW 6 | — | — | SW 6 | SSW 4 | SSE 3 | SE 4 | SSW 6 | SSW 7 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 9 |
| kJ | 35 | 23 | 47 | 60 | 55 | 42 | — | 2 | 30 | — | — | 18 | 5 | 6 | 15 | 149 | 154 | 226 | 457 | 483 | 617 | 528 | 669 | 548 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 298 | 287 | 273 | 282 | 273 | 273 | 13 | 13 | 13 | 13 | 263 | 253 | 285 | 299 | 299 | 299 | 285 | 343 | 326 | 298 | 298 | 282 | 343 | 287 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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