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Surf Forecasts:
Trefor surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 5 pm Tuesday 16 Dec 2025 GMTForecast update in hr min s Forecast update imminent
Trefor surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trefor sea temperature is
10.6° C
(Which is slightly warmer than usual)How big are the waves at Trefor today?
The current surf forecast for Trefor at 8PM is: 0.5m 8s primary swell from a Southwest direction and 0.2m 14s secondary swell from a West-southwest direction (forecast issued at 05:00pm December 16). The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Dec) | - | - |
| Afternoon (16 Dec) | 1.5ft (0.4m) | 8s |
| Evening (16 Dec) | 1.5ft (0.5m) | 8s |
Table - waves today at Trefor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| 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 | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 16 | 15 | 7 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 21 | 20 | 20 | 9 | 7 | 7 | 8 | 8 | 8 | 8 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 21 | 21 | 29 | 24 | 45 | 527 | 893 | 1078 | 1174 | 1174 | 640 | 531 | 492 | 251 | 275 | 221 | 307 | 493 | 544 | 910 | 1163 | 1020 | 768 | 587 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross- off | off | cross- off | cross | cross- off | cross- off | cross- off | off | off | off | cross- on | cross | cross- off | cross | cross | cross- off | cross- off |
High Tide / height (m) | 6:21PM 3.02 | 6:46AM 3.11 | 7:03PM 3.12 | 7:23AM 3.25 | 7:42PM 3.20 | 8:00AM 3.38 | ||||||||||||||||||
Low Tide / height (m) | 1:00PM 0.98 | 1:20AM 0.84 | 1:44PM 0.84 | 2:00AM 0.77 | 2:23PM 0.71 | 2:37AM 0.70 | ||||||||||||||||||
Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:25 | - | - | - | - | - | - | - | 8:26 | - | - | - | - | - | - | - | 8:26 | - |
| Sunset | 4:00 | - | - | - | - | - | - | - | 4:00 | - | - | - | - | - | - | - | 4:00 | - | - | - | - | - | - | - |
 |  |  |  | | |  |  | |  | |  | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | 5 | 6 | 5 | 8 | 8 | 3 | 1 | - | 1 | 2 | 3 | 2 | - | - | - | - | - | - |
| Temp. °C | 9 | 8 | 7 | 8 | 8 | 9 | 9 | 9 | 10 | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 9 | 9 | 8 | 9 | 9 |
| Feels °C (?) | 6 | 5 | 2 | 1 | -1 | -2 | -1 | -1 | 2 | 4 | 6 | 6 | 4 | 7 | 5 | 2 | 4 | -2 | -2 | -1 | -1 | -2 | 0 | -1 |
- 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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