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Llanddwyn Island Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Surf Forecasts:
Llanddwyn Island surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 12 am Tuesday 12 May 2026 BSTForecast update in hr min s Forecast update imminent
Llanddwyn Island surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Llanddwyn Island sea temperature is
11.6° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 5AM is: 0.1m 9s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West direction (forecast issued at 12:00am May 12). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 2ft (0.6m) | 3s |
| Afternoon (12 May) | 3.5ft (1.0m) | 5s |
| Evening (12 May) | 2.5ft (0.7m) | 4s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 12mm), heaviest on Thu morning. Very mild (max 12°C on Tue afternoon, min 7°C on Mon night). Winds increasing (calm on Mon night, strong winds from the WNW by Tue night). | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 8 | SW 9 | WNW 4 | NW 4 | NW 5 | WNW 5 | W 4 | W 5 | WNW 6 | WNW 7 | WNW 7 | WNW 6 | WNW 6 | SW 7 | SW 6 | NW 6 | NW 7 | NW 7 | NW 6 | NW 6 | NW 6 | SW 14 | SW 14 | |
3 | 3 | 3 | 14 | 45 | 33 | 21 | 13 | 78 | 224 | 319 | 331 | 216 | 123 | 11 | 9 | 220 | 267 | 246 | 188 | 124 | 62 | 8 | 8 | |
Wind (km/h) | ||||||||||||||||||||||||
glassy | on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 6:16AM3.28m | 7:00PM3.17m | 7:03AM3.52m | 7:41PM3.46m | 7:48AM3.79m | 8:21PM3.75m | ||||||||||||||||||
Low Tide | 00:22AM1.35m | 1:04PM0.90m | 1:22AM1.11m | 1:55PM0.61m | 2:15AM0.82m | 2:43PM0.34m | ||||||||||||||||||
 | |  | |  | | |  | |  |  | |  | | | | |  | | | | | | | |
 | — | 5:24 | — | — | — | — | — | — | — | 5:22 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:04 | — | — | — | — | — | — | — | 9:05 | — | — | — | — | — | — | — | 9:07 | — |
— | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | 1 | 1 | — | 1 | — | 1 | 1 | 2 | 1 | — | — | |
Temp °C | 7 | 8 | 9 | 9 | 10 | 12 | 12 | 11 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 9 | 9 | 10 | 11 | 8 |
5 | 5 | 5 | 3 | 3 | 7 | 7 | 4 | 1 | 0 | -1 | 0 | 1 | 2 | 3 | 1 | 1 | 0 | 1 | 2 | 3 | 4 | 6 | 4 | |
Swell 1 Height (m) Direction Period (s) | — | SW 8 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | SW 8 | — | SW 8 | W 17 | W 17 | SW 7 | WSW 7 | SW 7 | SW 6 | WSW 6 | W 16 | W 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 |
 kJ | — | 3 | 3 | 3 | 3 | 3 | 3 | 3 | — | 3 | 6 | 5 | 22 | 19 | 11 | 9 | 4 | 5 | 5 | 9 | 8 | 8 | 8 | 8 |
Swell 2 Height (m) Direction Period (s) | SW 8 | — | — | — | W 18 | — | — | — | — | — | — | — | W 16 | W 16 | WSW 5 | WSW 5 | W 16 | W 16 | — | — | — | — | — | W 7 |
| kJ | 3 | — | — | — | 7 | — | — | — | — | — | — | — | 5 | 5 | 10 | 2 | 5 | 5 | — | — | — | — | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 18 | — | — | — | — | — | — | — | W 16 | W 16 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | 5 | 5 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | WNW 3 | WNW 4 | NW 4 | NW 5 | WNW 5 | W 4 | W 5 | WNW 6 | WNW 7 | WNW 7 | WNW 6 | WNW 6 | NW 6 | NW 6 | NW 6 | NW 7 | NW 7 | NW 6 | NW 6 | NW 6 | NW 5 | NW 5 |
| kJ | — | — | 1 | 14 | 45 | 33 | 21 | 13 | 78 | 224 | 319 | 331 | 216 | 123 | 77 | 124 | 220 | 267 | 246 | 188 | 124 | 62 | 38 | 29 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 222 | 213 | 213 | 290 | 314 | 285 | 285 | 285 | 278 | 290 | 294 | 597 | 1345 | 641 | 612 | 608 | 328 | 608 | 597 | 359 | 356 | 255 | 286 | 175 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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