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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 Thursday 21 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
11.8° C
(Which is slightly warmer than usual)How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 2AM is: 0.6m 7s primary swell from a Southwest direction and 0.1m 15s secondary swell from a West direction, 0.3m 3s secondary swell from a South-southeast direction (forecast issued at 06:00pm May 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 3ft (0.9m) | 6s |
| Afternoon (22 May) | 2.5ft (0.8m) | 7s |
| Evening (22 May) | 1.5ft (0.4m) | 10s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 17°C on Thu night, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 7 | SW 7 | SW 7 | SW 7 | SW 8 | SSW 5 | SW 6 | SW 7 | SW 7 | SW 11 | WSW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 | |
99 | 94 | 73 | 54 | 28 | 34 | 52 | 64 | 64 | 159 | 42 | 50 | 48 | 48 | 98 | 76 | 23 | 21 | 20 | 12 | 12 | 11 | 11 | 11 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | |
High Tide | 1:31PM3.54m | 1:49AM3.84m | 2:41PM3.27m | 2:59AM3.64m | 4:04PM3.10m | 4:17AM3.52m | ||||||||||||||||||
Low Tide | 8:20PM0.68m | 9:00AM0.39m | 9:18PM0.91m | 10:05AM0.59m | 10:24PM1.08m | 11:14AM0.71m | ||||||||||||||||||
 | |  |  | |  |  | | | | | |  | | | | | | | | | | | | |
 | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:07 | — | — | — | — | — | — | — | 5:05 | — | — | — |
 | — | 9:17 | — | — | — | — | — | — | — | 9:20 | — | — | — | — | — | — | — | 9:21 | — | — | — | — | — | 9:22 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 15 | 16 | 17 | 16 | 14 | 15 | 16 | 16 | 15 | 14 | 14 | 13 | 12 | 14 | 15 | 15 | 15 | 14 | 13 | 13 | 13 | 14 | 16 |
11 | 12 | 15 | 14 | 12 | 11 | 12 | 13 | 13 | 12 | 12 | 12 | 11 | 10 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 | 14 | |
Swell 1 Height (m) Direction Period (s) | W 15 | W 15 | SW 7 | SW 7 | SW 8 | WSW 9 | SW 8 | SW 10 | SW 11 | — | WSW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 9 | SW 9 | SW 9 | SW 9 | SW 8 | SW 8 | SW 8 |
 kJ | 4 | 4 | 73 | 54 | 28 | 31 | 16 | 28 | 29 | — | 42 | 50 | 48 | 48 | 98 | 76 | 23 | 21 | 20 | 12 | 12 | 11 | 11 | 11 |
Swell 2 Height (m) Direction Period (s) | — | W 15 | W 15 | W 15 | W 14 | — | WSW 10 | — | — | — | SW 4 | — | — | SW 4 | — | — | — | SW 13 | SW 13 | SW 13 | SW 14 | SW 14 | W 14 | W 14 |
| kJ | — | 4 | 4 | 4 | 4 | — | 21 | — | — | — | 9 | — | — | 4 | — | — | — | 7 | 7 | 7 | 8 | 8 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | SW 14 | SW 14 | W 14 | W 14 | W 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 8 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | SW 7 | SW 7 | — | SSE 3 | SSW 4 | SSW 5 | SW 6 | SW 7 | SW 7 | SW 11 | SW 5 | SW 5 | SW 4 | SW 4 | — | — | SW 4 | SW 4 | SW 4 | SW 4 | SW 4 | SW 4 | SW 4 | SW 3 |
| kJ | 99 | 94 | — | 1 | 19 | 34 | 52 | 64 | 64 | 159 | 28 | 17 | 15 | 9 | — | — | 5 | 5 | 7 | 9 | 5 | 3 | 2 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 172 | 62 | 108 | 108 | 62 | 38 | 169 | 35 | 35 | 35 | 108 | 108 | 35 | 108 | 144 | 35 | 35 | 164 | 151 | 151 | 144 | 144 | 150 | 162 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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