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Porth Nefyn Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Porth Nefyn surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 12 am Sunday 19 Oct 2025 BST
How big are the waves at Porth Nefyn today?
The current surf forecast for Porth Nefyn at 4AM is: 1.3m 8s primary swell from a Southwest direction (forecast issued at 12:00am October 19). An open ocean swell of 1.0m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Oct) | 4ft (1.2m) | 8s |
| Afternoon (19 Oct) | 5ft (1.6m) | 9s |
| Evening (19 Oct) | 2.5ft (0.8m) | 9s |
Table - waves today at Porth Nefyn. (Swell directed towards the surf break)
Sunday 19 | Monday 20 | Tuesday 21 | ||||||||||||||||||||||
| 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 | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 6 | 9 | 9 | 12 | 11 | 11 | 11 | 10 | 10 | 9 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 100 | 132 | 191 | 167 | 222 | 275 | 397 | 321 | 95 | 62 | 61 | 57 | 176 | 208 | 343 | 298 | 182 | 142 | 198 | 76 | 42 | 102 | 147 | 135 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- on | on | on | on | cross | cross | cross | cross | cross | cross | cross- on |
High Tide / height (m) | 7:42PM 3.45 | 8:08AM 3.26 | 8:17PM 3.60 | 8:39AM 3.45 | 8:51PM 3.70 | 9:10AM 3.59 | ||||||||||||||||||
Low Tide / height (m) | 2:45AM 0.28 | 2:57PM 0.47 | 3:20AM 0.20 | 3:31PM 0.36 | 3:51AM 0.20 | 4:03PM 0.32 | ||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 7:50 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:54 | - | - | - |
| Sunset | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:12 | - | - | - | - | - | - | - | 6:09 | - |
 | |  | |  |  | |  | | | | | |  | |  | |  | | | | | | | |
Rain (mm) | - | - | 1 | 1 | 2 | 6 | 2 | - | - | - | 1 | 2 | 1 | - | - | - | - | 1 | 1 | 1 | 2 | 1 | 1 | - |
| Temp. °C | 12 | 13 | 13 | 14 | 14 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 13 | 13 | 13 | 13 |
| Feels °C (?) | 3 | 4 | 4 | 5 | 6 | 8 | 10 | 10 | 9 | 7 | 7 | 7 | 10 | 11 | 10 | 11 | 11 | 10 | 7 | 6 | 6 | 5 | 4 | 5 |
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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
The wind is still offshore at Porth Nefyn (strong winds from the SSE at Aberdaron 22 km from Porth Nefyn). 1.6m 4s local chop from the SSE with a 0.6m 8s swell from the SW. 2 swells combining to make bigger set waves.
22 km away, 51 min ago
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