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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 6 pm Sunday 17 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
11.5° C
(Which is slightly warmer than usual)How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 1AM is: 1.1m 6s primary swell from a Southwest direction and 0.1m 12s secondary swell from a West direction (forecast issued at 06:00pm May 17). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 3.5ft (1.1m) | 7s |
| Afternoon (18 May) | 2ft (0.6m) | 7s |
| Evening (18 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 ForecastHeavy rain (total 22mm), heaviest during Mon night. Very mild (max 13°C on Wed morning, min 8°C on Sun night). Winds increasing (light winds from the WSW on Sun night, strong winds from the SSW by Tue afternoon). | ||||||||||||||||||||||||
Sun 17 | Monday 18 | Tuesday 19 | Wed 20 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 4 | SW 5 | SW 5 | SW 6 | SW 6 | WSW 7 | SW 6 | SW 7 | SW 7 | SW 6 | SSW 4 | SW 5 | SW 6 | SSW 7 | SSW 7 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 6 | SW 6 | SW 6 | |
38 | 61 | 69 | 69 | 66 | 110 | 51 | 35 | 36 | 10 | 16 | 40 | 91 | 180 | 180 | 143 | 331 | 516 | 582 | 619 | 445 | 269 | 190 | 150 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | on | on | on | on | on | on | on | on | on | |
High Tide | 10:24PM4.29m | 10:49AM4.27m | 11:09PM4.30m | 11:39AM4.11m | 11:57PM4.21m | 12:31PM3.85m | ||||||||||||||||||
Low Tide | 5:00PM-0.03m | 5:24AM-0.11m | 5:47PM0.04m | 6:14AM-0.11m | 6:36PM0.21m | 7:05AM-0.01m | ||||||||||||||||||
 |  |  |  |  | | |  |  | | | | | | | |  | | | | | | | | |
 | — | — | — | — | 5:15 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — | — | 5:11 | — | — | — |
 | — | 9:12 | — | — | — | — | — | — | — | 9:14 | — | — | — | — | — | — | — | 9:15 | — | — | — | — | — | 9:16 |
1 | 1 | — | 2 | 1 | 1 | 1 | — | — | — | 1 | 3 | 2 | 4 | 1 | 1 | — | — | 1 | 1 | 1 | — | — | — | |
Temp °C | 10 | 9 | 9 | 8 | 8 | 9 | 10 | 11 | 12 | 11 | 10 | 10 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 13 |
4 | 4 | 4 | 4 | 5 | 6 | 7 | 7 | 8 | 6 | 5 | 5 | 6 | 7 | 6 | 6 | 4 | 4 | 5 | 4 | 6 | 6 | 6 | 7 | |
Swell 1 Height (m) Direction Period (s) | NW 4 | — | — | W 12 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SW 6 | SW 6 | SW 5 | SW 6 | — | — | — | — | — | — | — | — | — | — | — |
 kJ | 3 | — | — | 3 | 66 | 58 | 51 | 35 | 36 | 10 | 9 | 40 | 91 | — | — | — | — | — | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 12 | WNW 4 | WNW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 3 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 5 | SW 5 | SW 6 | — | WSW 7 | — | — | — | SSW 4 | SSW 4 | SSE 4 | SSE 4 | SSW 7 | SSW 7 | SW 6 | SW 7 | SW 7 | SW 8 | SW 8 | SW 8 | SW 6 | SW 6 | SW 6 |
| kJ | 38 | 61 | 69 | 69 | — | 110 | — | — | — | 8 | 16 | 12 | 35 | 180 | 180 | 143 | 331 | 516 | 582 | 619 | 445 | 269 | 190 | 150 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 255 | 255 | 255 | 255 | 35 | 35 | 35 | 35 | 270 | 270 | 270 | 320 | 295 | 239 | 270 | 295 | 279 | 278 | 267 | 272 | 272 | 272 | 385 | 385 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
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Ocean Swells (m)- Wind Speed (km/h)
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