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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 Wednesday 20 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 3PM is: 1.8m 6s primary swell from a Southwest direction (forecast issued at 12:00pm May 20). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 6.5ft (2.0m) | 6s |
| Afternoon (20 May) | 6ft (1.8m) | 6s |
| Evening (20 May) | 5ft (1.5m) | 6s |
Table - waves today at Hells Mouth (Porth Neigwl). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Wed night. Very mild (max 17°C on Thu afternoon, min 12°C on Wed morning). Winds decreasing (fresh winds from the SW on Wed morning, light winds from the SSE by Fri night). | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 5 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | SW 8 | SW 9 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | |
282 | 287 | 239 | 167 | 115 | 96 | 54 | 120 | 141 | 109 | 97 | 89 | 82 | 93 | 119 | 188 | 166 | 170 | 177 | 160 | 151 | 145 | 100 | 98 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | |
High Tide | 11:26AM4.19m | 11:47PM4.37m | 12:18PM3.82m | 00:41AM4.09m | 1:15PM3.46m | 1:42AM3.81m | ||||||||||||||||||
Low Tide | 6:43PM0.67m | 7:21AM0.44m | 7:38PM0.87m | 8:21AM0.62m | 8:36PM1.06m | |||||||||||||||||||
 |  | | |  |  |  |  | | | | |  | | | | | | | | | | | | |
 | 5:13 | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — |
 | — | — | — | 9:15 | — | — | — | — | — | — | — | 9:16 | — | — | — | — | — | — | — | 9:19 | — | — | — | 9:20 |
— | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 15 | 16 | 17 | 17 | 16 | 16 | 14 | 14 | 15 | 15 | 15 | 15 | 14 | 14 | 13 |
5 | 5 | 5 | 7 | 7 | 7 | 6 | 8 | 8 | 11 | 12 | 15 | 15 | 11 | 12 | 11 | 11 | 13 | 12 | 12 | 13 | 12 | 12 | 12 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | WSW 12 | WSW 8 | SW 5 | WSW 8 | WSW 10 | — | W 15 | W 15 | SW 7 | SW 8 | SW 9 | SW 9 | SW 9 | SW 9 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 |
 kJ | — | — | — | 50 | 45 | 34 | 42 | 22 | — | 4 | 4 | 89 | 82 | 93 | 119 | 188 | 166 | 170 | 177 | 160 | 151 | 145 | 100 | 98 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | WSW 12 | WSW 8 | WSW 9 | W 11 | — | W 15 | — | W 15 | W 15 | W 15 | W 14 | — | — | — | — | — | SW 4 | SW 4 | SW 4 | WSW 4 |
| kJ | — | — | — | — | 48 | 27 | 31 | 10 | — | 4 | — | 4 | 4 | 4 | 4 | — | — | — | — | — | 4 | 4 | 4 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | WSW 12 | WSW 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 13 | 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 5 | SW 6 | SW 6 | SW 7 | SW 7 | — | — | SSE 3 | SSE 3 | — | — | — | — | SW 4 | — | — | — | — |
| kJ | 282 | 287 | 239 | 167 | 115 | 96 | 54 | 120 | 141 | 109 | 97 | — | — | 3 | 4 | — | — | — | — | 7 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 294 | 294 | 275 | 348 | 255 | 255 | 52 | 64 | 64 | 157 | 157 | 135 | 138 | 136 | 107 | 31 | 135 | 31 | 135 | 5 | 141 | 38 | 38 | 73 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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