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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 am Thursday 21 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 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 4AM is: 1.0m 5s primary swell from a South-southwest direction and 0.6m 8s secondary swell from a West-southwest direction, 0.2m 11s secondary swell from a West-southwest direction (forecast issued at 12:00am May 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 4.5ft (1.4m) | 6s |
| Afternoon (21 May) | 3.5ft (1.1m) | 7s |
| Evening (21 May) | 3ft (0.9m) | 8s |
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 3mm), mostly falling on Wed night. Very mild (max 17°C on Thu night, min 12°C on Wed night). Winds decreasing (fresh winds from the S on Wed night, light winds from the SSW by Fri night). | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | ||||||||||||||||||||||
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 | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SW 8 | SSW 5 | SW 6 | SW 7 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 9 | SW 9 | SW 9 | |
206 | 56 | 190 | 173 | 127 | 121 | 94 | 82 | 75 | 141 | 196 | 181 | 177 | 157 | 157 | 148 | 145 | 100 | 98 | 64 | 63 | 59 | 41 | 40 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | cross-on | |
High Tide | 11:47PM4.37m | 12:18PM3.82m | 00:41AM4.09m | 1:15PM3.46m | 1:42AM3.81m | 2:23PM3.18m | ||||||||||||||||||
Low Tide | 7:21AM0.44m | 7:38PM0.87m | 8:21AM0.62m | 8:36PM1.06m | 9:24AM0.78m | 9:40PM1.18m | ||||||||||||||||||
 |  |  |  |  | | | | |  | | | | | |  | | |  | | | | | | |
 | — | 5:11 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:16 | — | — | — | — | — | — | — | 9:19 | — | — | — | — | — | — | — | 9:20 | — |
— | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 12 | 12 | 12 | 13 | 14 | 15 | 16 | 17 | 16 | 15 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 |
7 | 6 | 6 | 8 | 10 | 11 | 14 | 15 | 11 | 11 | 11 | 11 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 14 | 13 | 14 | |
Swell 1 Height (m) Direction Period (s) | SW 5 | WSW 8 | W 11 | — | W 15 | W 15 | SW 8 | SW 8 | SW 8 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | WSW 9 | SW 9 | SW 9 |
 kJ | 45 | 41 | 10 | — | 4 | 4 | 94 | 82 | 75 | 141 | 196 | 181 | 177 | 157 | 157 | 148 | 145 | 100 | 98 | 64 | 63 | 59 | 41 | 40 |
Swell 2 Height (m) Direction Period (s) | WSW 9 | WSW 11 | — | — | — | — | W 15 | W 15 | W 15 | W 14 | — | — | — | — | — | WSW 4 | SW 4 | SW 4 | WSW 4 | — | — | — | W 14 | SW 13 |
| kJ | 32 | 13 | — | — | — | — | 4 | 4 | 4 | 4 | — | — | — | — | — | 3 | 4 | 4 | 1 | — | — | — | 4 | 7 |
Swell 3 Height (m) Direction Period (s) | WSW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 8 | SSW 5 | SW 6 | SW 7 | SW 7 | SW 7 | — | — | SSE 3 | SSE 3 | — | — | — | — | — | SW 4 | — | — | — | — | — | — | — | — |
| kJ | 206 | 56 | 190 | 173 | 127 | 121 | — | — | 3 | 4 | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 64 | 204 | 204 | 204 | 135 | 138 | 138 | 107 | 135 | 38 | 31 | 64 | 5 | 5 | 5 | 64 | 73 | 5 | 5 | 107 | 5 | 5 | 5 | 107 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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