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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 pm 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 11PM is: 0.8m 8s primary swell from a Southwest direction and 0.1m 15s secondary swell from a West direction (forecast issued at 06:00pm May 21). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | - | - |
| 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 ForecastMostly dry. Very mild (max 17°C on Thu night, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 7 | SW 7 | SW 8 | SW 8 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | WSW 9 | WSW 9 | SW 9 | WSW 9 | SW 9 | SW 9 | WSW 9 | SW 8 | |
130 | 105 | 96 | 75 | 117 | 196 | 177 | 173 | 184 | 180 | 170 | 102 | 117 | 98 | 98 | 76 | 59 | 55 | 40 | 31 | 20 | 38 | 30 | 18 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 00:41AM4.09m | 1:15PM3.46m | 1:42AM3.81m | 2:23PM3.18m | 2:52AM3.59m | |||||||||||||||||||
Low Tide | 7:38PM0.87m | 8:21AM0.62m | 8:36PM1.06m | 9:24AM0.78m | 9:40PM1.18m | 10:30AM0.87m | ||||||||||||||||||
 |  |  | |  | | | | | | | |  |  | | | | | | | | | | | |
 | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:07 | — | — | — |
 | — | 9:16 | — | — | — | — | — | — | — | 9:19 | — | — | — | — | — | — | — | 9:20 | — | — | — | — | — | 9:22 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 16 | 17 | 16 | 15 | 14 | 14 | 15 | 16 | 15 | 15 | 14 | 14 | 13 | 13 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 15 |
11 | 14 | 16 | 11 | 11 | 11 | 11 | 13 | 14 | 12 | 12 | 12 | 12 | 12 | 10 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 14 | |
Swell 1 Height (m) Direction Period (s) | W 15 | SW 7 | SW 8 | SW 8 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | WSW 10 | WSW 10 | SW 10 | WSW 10 | SW 10 | SW 10 | SW 10 | WSW 9 | WSW 9 | SW 9 | WSW 9 | SW 9 | SW 9 | WSW 9 | SW 8 |
 kJ | 4 | 105 | 96 | 75 | 117 | 196 | 177 | 173 | 184 | 138 | 41 | 102 | 38 | 98 | 98 | 76 | 59 | 55 | 40 | 31 | 20 | 38 | 30 | 18 |
Swell 2 Height (m) Direction Period (s) | W 15 | W 15 | W 15 | W 15 | W 14 | — | — | — | — | — | SW 4 | — | WSW 4 | SW 4 | — | — | — | — | SW 4 | SW 4 | SW 4 | SW 14 | SW 14 | SW 14 |
| kJ | 4 | 4 | 4 | 4 | 4 | — | — | — | — | — | 9 | — | 2 | 4 | — | — | — | — | 4 | 4 | 2 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 14 | SW 14 | W 14 | W 14 | W 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 8 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | SW 7 | — | — | SE 3 | SSE 3 | — | — | — | — | SW 10 | SW 10 | SW 4 | SW 10 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 130 | — | — | 2 | 4 | — | — | — | — | 180 | 170 | 11 | 117 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 138 | 38 | 73 | 73 | 38 | 31 | 135 | 5 | 5 | 5 | 73 | 73 | 5 | 73 | 107 | 5 | 5 | 128 | 114 | 114 | 107 | 107 | 114 | 128 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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