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Trefor Surf Forecast
/ Wales – Lleyn (14 surf breaks) /
Surf Forecasts:
Trefor surfForecast / Wales – Lleyn / UK
48hr Weather and Surf, issued 12 am Sunday 17 May 2026 BSTForecast 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
12.0° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Trefor today?
The current surf forecast for Trefor at 7AM is: 0.9m 5s primary swell from a West direction and 0.1m 13s secondary swell from a West direction (forecast issued at 12:00am May 17). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 3ft (0.9m) | 5s |
| Afternoon (17 May) | 1.5ft (0.4m) | 4s |
| Evening (17 May) | - | - |
Table - waves today at Trefor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 20mm), heaviest during Mon night. Very mild (max 13°C on Tue morning, min 8°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SW by Tue morning). | ||||||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | ||||||||||||||||||||||
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 | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
WSW 4 | W 4 | W 5 | WSW 5 | NW 4 | NW 4 | SW 5 | SW 5 | W 12 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 4 | S 5 | SSW 6 | SW 6 | SW 7 | SW 7 | SW 7 | |
24 | 31 | 34 | 35 | 5 | 3 | 0 | 0 | 3 | 38 | 36 | 30 | 18 | 13 | 13 | 11 | 5 | 9 | 0 | 0 | 0 | 335 | 440 | 392 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-off | glassy | glassy | glassy | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 9:25AM4.01m | 9:47PM4.01m | 10:11AM3.98m | 10:31PM4.02m | 10:59AM3.82m | |||||||||||||||||||
Low Tide | 4:09AM0.07m | 4:34PM0.05m | 4:58AM-0.02m | 5:21PM0.13m | 5:48AM-0.01m | 6:10PM0.28m | ||||||||||||||||||
 |  |  |  | | |  |  |  | | | | |  | | | | | | | | |  | | |
 | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:10 | — | — | — | — | — | — | — | 9:13 | — | — | — | — | — | — | — | 9:14 | — |
— | — | — | 1 | — | 2 | 1 | 1 | 1 | 2 | 1 | 1 | — | — | — | — | 1 | 1 | 3 | 2 | 1 | 1 | — | — | |
Temp °C | 10 | 9 | 9 | 9 | 10 | 9 | 10 | 9 | 9 | 8 | 8 | 9 | 10 | 11 | 11 | 10 | 10 | 10 | 11 | 12 | 13 | 13 | 12 | 12 |
5 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 7 | 6 | 5 | 5 | 7 | 8 | 7 | 6 | 6 | 7 | |
Swell 1 Height (m) Direction Period (s) | — | — | W 13 | W 12 | NW 4 | NW 4 | — | — | W 12 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 4 | — | — | — | — | — | — |
 kJ | — | — | 3 | 3 | 5 | 3 | — | — | 3 | 38 | 36 | 30 | 18 | 13 | 13 | 11 | 5 | 9 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | W 12 | WNW 4 | WNW 4 | WNW 4 | NW 4 | WNW 3 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 3 | 1 | 1 | 1 | 2 | 1 | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 12 | W 12 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 4 | W 4 | W 5 | WSW 5 | SW 5 | WSW 5 | SW 5 | SW 5 | SW 6 | — | — | — | WNW 3 | — | — | — | S 3 | SSE 3 | S 5 | SSW 6 | SW 6 | SW 7 | SW 7 | SW 7 |
| kJ | 24 | 31 | 34 | 35 | 31 | 44 | 66 | 65 | 59 | — | — | — | 1 | — | — | — | 4 | 7 | 43 | 72 | 133 | 335 | 440 | 392 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 285 | 149 | 160 | 285 | 285 | 280 | 280 | 280 | 20 | 20 | 20 | 20 | 276 | 276 | 260 | 260 | 269 | 303 | 318 | 283 | 311 | 287 | 287 | 287 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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