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Hells Mouth (Porth Neigwl) Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Hells Mouth (Porth Neigwl) surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 12 pm Tuesday 12 May 2026 BSTForecast update in hr min s Forecast update imminent
Hells Mouth (Porth Neigwl) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Hells Mouth (Porth Neigwl) sea temperature is
11.8° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Hells Mouth (Porth Neigwl) today?
The current surf forecast for Hells Mouth (Porth Neigwl) at 7PM is: 0.1m 18s primary swell from a West direction and 0.1m 8s secondary swell from a Southwest direction, 0.3m 4s secondary swell from a West-southwest direction (forecast issued at 12:00pm May 12). An open ocean swell of 0.6m 5s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 1.5ft (0.5m) | 3s |
| Afternoon (12 May) | 3ft (0.9m) | 5s |
| Evening (12 May) | 2.5ft (0.8m) | 4s |
Table - waves today at Hells Mouth (Porth Neigwl). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 8mm), mostly falling on Tue night. Very mild (max 12°C on Tue afternoon, min 8°C on Tue night). Winds increasing (light winds from the WNW on Tue afternoon, strong winds from the WNW by Tue night). | ||||||||||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
WNW 4 | NW 4 | NW 5 | W 18 | WNW 4 | W 5 | WNW 6 | WNW 7 | WNW 7 | NW 7 | WSW 7 | WSW 7 | WSW 6 | NW 7 | NW 7 | SW 16 | NW 6 | SW 15 | W 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | |
10 | 32 | 31 | 6 | 16 | 94 | 240 | 394 | 424 | 289 | 61 | 41 | 16 | 391 | 514 | 10 | 238 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-off | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 5:41PM3.23m | 5:57AM3.67m | 6:31PM3.61m | 6:47AM4.01m | 7:16PM3.98m | |||||||||||||||||||
Low Tide | 12:12PM1.00m | 00:29AM1.17m | 1:06PM0.74m | 1:23AM0.92m | 1:54PM0.50m | 2:13AM0.65m | ||||||||||||||||||
 |  |  | |  |  |  |  |  | | | |  |  | | | | | | | | | | | |
 | 5:26 | — | — | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:20 | — |
 | — | — | — | 9:02 | — | — | — | — | — | — | — | 9:05 | — | — | — | — | — | — | — | 9:06 | — | — | — | 9:07 |
— | — | — | — | — | — | 1 | 1 | 1 | — | — | — | 1 | — | 1 | 1 | 1 | 1 | — | — | — | — | — | — | |
Temp °C | 9 | 10 | 11 | 12 | 11 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 11 | 10 | 9 | 9 | 9 |
3 | 3 | 6 | 7 | 2 | -1 | -1 | -3 | -2 | 0 | 1 | 2 | -1 | -2 | -1 | -1 | 0 | 0 | 2 | 4 | 5 | 3 | 2 | 1 | |
Swell 1 Height (m) Direction Period (s) | SW 9 | SW 8 | SW 8 | NNW 5 | SW 8 | SW 8 | — | W 17 | W 16 | WSW 7 | WSW 7 | WSW 7 | WSW 6 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | WSW 6 | SW 5 | SW 14 | SW 14 | SW 14 |
 kJ | 3 | 3 | 3 | 15 | 3 | 3 | — | 6 | 5 | 62 | 61 | 41 | 16 | 10 | 10 | 10 | 9 | 8 | 8 | 3 | 1 | 8 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | — | W 18 | W 18 | SW 8 | — | — | — | — | — | SW 16 | SW 16 | SW 16 | SW 16 | W 16 | W 16 | W 16 | W 15 | SW 15 | W 15 | SW 14 | SW 14 | — | W 6 | W 14 |
| kJ | — | 7 | 6 | 3 | — | — | — | — | — | 10 | 10 | 10 | 10 | 5 | 5 | 5 | 5 | 8 | 4 | 8 | 8 | — | 1 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | W 18 | W 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 14 | — | — |
| kJ | — | — | 6 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — |
Wind waves Height (m) Direction Period (s) | WNW 4 | NW 4 | NW 5 | WSW 4 | WNW 4 | W 5 | WNW 6 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 6 | NNW 6 | NW 7 | NW 7 | NW 7 | NW 6 | NW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 6 |
| kJ | 10 | 32 | 31 | 3 | 16 | 94 | 240 | 394 | 424 | 289 | 187 | 190 | 216 | 391 | 514 | 362 | 238 | 209 | 159 | 119 | 91 | 122 | 165 | 96 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 319 | 328 | 417 | 318 | 318 | 308 | 319 | 320 | 637 | 919 | 915 | 915 | 574 | 574 | 295 | 295 | 319 | 319 | 305 | 320 | 41 | 136 | 51 | 305 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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