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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 16 Sep 2025 BST
How big are the waves at Hells Mouth (Porth Neigwl) today?
The current surf forecast for Hells Mouth (Porth Neigwl) at 6PM is: 1.1m 6s primary swell from a Southwest direction and 0.6m 5s secondary swell from a Northwest direction (forecast issued at 12:00pm September 16). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Sep) | 6.5ft (2.0m) | 6s |
| Afternoon (16 Sep) | 3.5ft (1.1m) | 7s |
| Evening (16 Sep) | 4ft (1.2m) | 5s |
Table - waves today at Hells Mouth (Porth Neigwl). (Swell directed towards the surf break)
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 7 | 5 | 5 | 6 | 6 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 6 | 7 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 245 | 149 | 106 | 70 | 90 | 96 | 197 | 776 | 865 | 772 | 660 | 612 | 421 | 384 | 247 | 539 | 637 | 637 | 713 | 582 | 483 | 432 | 400 | 269 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | on | on | on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | on | on | cross- on | cross- on | cross- on | on | cross- on |
High Tide / height (m) | 4:21PM 3.14 | 5:17AM 3.01 | 5:48PM 3.35 | 6:29AM 3.24 | 6:49PM 3.68 | |||||||||||||||||||
Low Tide / height (m) | 11:22AM 1.45 | 12:13AM 1.13 | 12:45PM 1.24 | 1:24AM 0.83 | 1:45PM 0.94 | 2:17AM 0.53 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:54 | - | - | - | - | - | - | - | 6:56 | - | - | - | - | - | - | - | 6:58 |
| Sunset | - | - | - | 7:31 | - | - | - | - | - | - | - | 7:30 | - | - | - | - | - | - | - | 7:27 | - | - | - | - |
 |  |  |  |  |  |  |  | | | | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | 1 | - | 3 | 9 | 10 | - | - | - | - | - | - | 2 | 1 | 1 | - | - | - | - | - | - | 1 |
| Temp. °C | 13 | 14 | 15 | 15 | 14 | 13 | 14 | 16 | 17 | 16 | 16 | 16 | 16 | 15 | 16 | 17 | 16 | 16 | 17 | 17 | 16 | 16 | 16 | 16 |
| Feels °C (?) | 6 | 9 | 10 | 10 | 8 | 7 | 6 | 9 | 10 | 9 | 11 | 11 | 11 | 10 | 12 | 10 | 10 | 10 | 11 | 11 | 10 | 10 | 11 | 13 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Wales - Lleyn
Wind reports 11 km away suggest it is still onshore at Hells Mouth (Porth Neigwl) (fresh winds from the SW at Aberdaron). 1.0m 6s windswell from the WSW with a 0.6m 5s windswell from the NW. 2 swells combining to make bigger set waves.
1 h 10 min ago
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