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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 6 am Saturday 16 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
11.6° C
(Which is slightly warmer than usual)How big are the waves at Hells Mouth (Porth Neigwl) today?
The current surf forecast for Hells Mouth (Porth Neigwl) at 12PM is: 0.5m 4s primary swell from a Southwest direction and 0.1m 13s secondary swell from a West direction (forecast issued at 06:00am May 16). An open ocean swell of 0.2m 5s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 1.5ft (0.4m) | 4s |
| Afternoon (16 May) | 2.5ft (0.7m) | 4s |
| Evening (16 May) | 2.5ft (0.7m) | 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 ForecastModerate rain (total 15mm), heaviest on Mon night. Very mild (max 12°C on Mon afternoon, min 9°C on Sat morning). Winds increasing (light winds from the WSW on Sun night, strong winds from the SSE by Mon night). | ||||||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | Tue 19 | |||||||||||||||||||||
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 | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
W 13 | W 13 | SW 4 | WSW 3 | SW 4 | WSW 4 | WSW 4 | W 4 | W 5 | W 5 | W 5 | WSW 5 | WSW 5 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 | |
3 | 3 | 4 | 8 | 16 | 10 | 17 | 28 | 41 | 55 | 56 | 48 | 67 | 114 | 152 | 145 | 88 | 54 | 39 | 30 | 18 | 18 | 9 | 23 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | on | on | cross-on | on | cross | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross | cross-on | cross | |
High Tide | 8:19AM4.56m | 8:43PM4.55m | 9:04AM4.68m | 9:27PM4.69m | 9:50AM4.65m | 10:11PM4.70m | ||||||||||||||||||
Low Tide | 3:27PM0.22m | 3:49AM0.25m | 4:14PM0.22m | 4:39AM0.16m | 5:02PM0.31m | |||||||||||||||||||
 |  |  | | | |  |  | | | | | | |  | | |  | | | | | | | |
 | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | 5:15 |
 | — | — | — | — | — | 9:09 | — | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | 9:14 |
— | — | 1 | 1 | 1 | 1 | 1 | — | — | — | 1 | — | — | 1 | 1 | 1 | — | — | — | — | — | — | 1 | 2 | |
Temp °C | 10 | 10 | 9 | 10 | 10 | 11 | 11 | 10 | 9 | 9 | 9 | 10 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 10 | 11 | 12 | 11 | 11 |
6 | 7 | 4 | 6 | 4 | 7 | 6 | 3 | 3 | 3 | 3 | 2 | 3 | 3 | 4 | 3 | 5 | 6 | 5 | 6 | 8 | 8 | 5 | 3 | |
Swell 1 Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | N 5 | — | — | W 13 | W 13 | W 13 | — | — | NW 4 | NW 4 | — | — | — | NW 4 | NW 4 | NW 4 | SW 6 | SW 6 | SW 6 | SW 6 | SW 5 |
 kJ | 2 | 2 | 2 | 2 | — | — | 3 | 3 | 3 | — | — | 7 | 3 | — | — | — | 4 | 4 | 4 | 30 | 18 | 18 | 9 | 23 |
Swell 2 Height (m) Direction Period (s) | W 13 | SW 4 | W 13 | W 13 | W 13 | W 13 | — | — | — | — | — | W 16 | — | — | — | — | W 12 | NW 4 | WNW 4 | WNW 4 | — | — | WSW 6 | — |
| kJ | 3 | 1 | 3 | 3 | 3 | 3 | — | — | — | — | — | 5 | — | — | — | — | 3 | 4 | 1 | 1 | — | — | 4 | — |
Swell 3 Height (m) Direction Period (s) | — | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 11 | — | — | — | — | — | — |
| kJ | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 3 | — | SW 4 | WSW 3 | SW 4 | WSW 4 | WSW 4 | W 4 | W 5 | W 5 | W 5 | WSW 5 | WSW 5 | SW 6 | SW 6 | WSW 6 | SW 6 | SW 6 | SW 6 | — | — | — | SSW 4 | SE 4 |
| kJ | 1 | — | 4 | 8 | 16 | 10 | 17 | 28 | 41 | 55 | 56 | 48 | 67 | 114 | 152 | 145 | 88 | 54 | 39 | — | — | — | 7 | 13 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 304 | 304 | 304 | 294 | 308 | 285 | 298 | 298 | 295 | 142 | 308 | 298 | 298 | 286 | 286 | 64 | 5 | 5 | 107 | 255 | 239 | 204 | 297 | 239 |
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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