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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 Wednesday 20 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
12.1° C
(Which is 1.3°C warmer than normal for this time of year)| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | - | - |
| Afternoon (20 May) | 5.5ft (1.7m) | 6s |
| Evening (20 May) | 1.5ft (0.4m) | 10s |
Table - waves today at Trefor. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Wed night. Very mild (max 16°C on Thu night, min 11°C on Tue night). Winds decreasing (fresh winds from the SSW on Tue night, light winds from the S by Thu afternoon). | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
SW 8 | SW 9 | SW 9 | SW 6 | SW 6 | SW 6 | SW 6 | SW 10 | SW 5 | WSW 10 | SW 6 | W 15 | SW 6 | SW 6 | SW 7 | SW 7 | SW 7 | SW 10 | SW 10 | WSW 9 | SW 6 | SW 6 | SW 6 | SW 10 | |
575 | 493 | 397 | 0 | 212 | 193 | 0 | 24 | 49 | 19 | 0 | 4 | 95 | 85 | 77 | 69 | 62 | 45 | 44 | 35 | 54 | 49 | 42 | 147 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | off | cross-off | cross-off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off | |
High Tide | 11:18PM3.94m | 11:49AM3.56m | 00:09AM3.76m | 12:43PM3.24m | 1:05AM3.54m | 1:45PM2.93m | ||||||||||||||||||
Low Tide | 6:41AM0.08m | 7:00PM0.48m | 7:37AM0.24m | 7:54PM0.68m | 8:37AM0.41m | 8:53PM0.87m | ||||||||||||||||||
 |  |  |  |  | | |  |  | |  | | | | | | | | | | | | | | |
 | — | 5:11 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:15 | — | — | — | — | — | — | — | 9:17 | — | — | — | — | — | — | — | 9:19 | — |
1 | 1 | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 11 | 11 | 11 | 12 | 13 | 14 | 12 | 12 | 12 | 12 | 13 | 13 | 15 | 15 | 15 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 15 | 14 |
4 | 5 | 6 | 6 | 7 | 8 | 8 | 9 | 8 | 8 | 10 | 9 | 11 | 11 | 13 | 14 | 13 | 13 | 12 | 12 | 14 | 14 | 13 | 12 | |
Swell 1 Height (m) Direction Period (s) | — | — | — | — | — | — | — | SW 10 | SW 5 | WSW 10 | — | W 15 | W 15 | W 15 | SW 7 | SW 7 | SW 7 | SW 10 | SW 10 | WSW 9 | SW 10 | SW 10 | WSW 10 | WSW 10 |
 kJ | — | — | — | — | — | — | — | 24 | 49 | 19 | — | 4 | 4 | 4 | 77 | 69 | 62 | 45 | 44 | 35 | 25 | 27 | 41 | 40 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 15 | W 15 | W 15 | W 14 | — | SW 8 | SW 8 | SW 8 | SW 8 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 4 | 4 | — | 2 | 9 | 9 | 2 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 8 | SW 9 | SW 9 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 5 | SW 6 | SW 6 | SW 6 | SW 6 | — | — | — | SSW 4 | SSW 5 | SSW 6 | SW 6 | SW 6 | SW 6 | SW 10 |
| kJ | 575 | 493 | 397 | 177 | 212 | 193 | 141 | 108 | 108 | 90 | 118 | 105 | 95 | 85 | — | — | — | 13 | 30 | 41 | 54 | 49 | 42 | 147 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 280 | 280 | 280 | 295 | 382 | 270 | 269 | 64 | 80 | 173 | 173 | 154 | 154 | 157 | 93 | 93 | 93 | 26 | 26 | 154 | 20 | 20 | 48 | 93 |
Best forecast wave conditions in Lleyn Peninsula | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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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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