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Surf Forecasts:
Hells Mouth (Porth Neigwl) surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 5 am Monday 15 Dec 2025 GMTForecast 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
10.4° C
(Which is normal for this time of year)How big are the waves at Hells Mouth (Porth Neigwl) today?
The current surf forecast for Hells Mouth (Porth Neigwl) at 12PM is: 1.2m 10s primary swell from a Southwest direction (forecast issued at 05:00am December 15). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 4.5ft (1.4m) | 10s |
| Afternoon (15 Dec) | 3.5ft (1.0m) | 10s |
| Evening (15 Dec) | 2.5ft (0.8m) | 9s |
Table - waves today at Hells Mouth (Porth Neigwl). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 14 | 14 | 14 | 14 | 8 | 15 | 6 | 7 | 7 | 8 | 9 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1391 | 724 | 404 | 286 | 177 | 125 | 97 | 61 | 58 | 57 | 33 | 37 | 38 | 39 | 39 | 60 | 45 | 165 | 403 | 715 | 1070 | 1884 | 1785 | 1040 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross | cross | cross | glass | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on |
High Tide / height (m) | 4:48AM 3.17 | 5:07PM 3.34 | 5:37AM 3.35 | 5:54PM 3.44 | 6:18AM 3.53 | 6:37PM 3.56 | ||||||||||||||||||
Low Tide / height (m) | 11:43AM 1.30 | 12:13AM 1.10 | 12:38PM 1.17 | 12:59AM 1.02 | 1:23PM 1.01 | |||||||||||||||||||
Monday 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
| Sunrise | - | - | 8:22 | - | - | - | - | - | - | - | 8:23 | - | - | - | - | - | - | - | 8:25 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:01 | - | - | - | - | - | - | - | 4:01 | - | - | - |
 |  |  | |  | |  | | |  | | |  | | | |  | | | | | | | | |
Rain (mm) | 10 | 3 | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 2 | 7 | 8 | - |
| Temp. °C | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 |
| Feels °C (?) | 9 | 7 | 7 | 6 | 5 | 5 | 5 | 5 | 3 | 3 | 5 | 6 | 7 | 5 | 4 | 2 | 1 | -1 | -2 | -1 | -1 | -1 | 1 | 5 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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