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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 am Saturday 18 Apr 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
9.6° C
(Which is 1.0°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 1PM is: 0.7m 6s primary swell from a Southwest direction and 0.3m 10s secondary swell from a West-southwest direction, 0.6m 5s secondary swell from a West-northwest direction (forecast issued at 06:00am April 18). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 3ft (0.9m) | 5s |
| Afternoon (18 Apr) | 2.5ft (0.7m) | 6s |
| Evening (18 Apr) | 1.5ft (0.5m) | 7s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| 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 | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 5 | 6 | 6 | 6 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 9 | 9 | 6 | 6 | 15 | 15 | 15 | 15 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 153 | 103 | 49 | 33 | 42 | 34 | 21 | 15 | 14 | 9 | 5 | 5 | 5 | 5 | 3 | 2 | 2 | 1 | 1 | 4 | 4 | 4 | 4 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross | cross | cross | glass | glass | off | off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross- off | glass | glass | off | cross- off | cross- off | cross- off |
High Tide / height (m) | 10:24AM 4.46 | 10:46PM 4.31 | 11:05AM 4.44 | 11:25PM 4.29 | 11:49AM 4.27 | 12:08AM 4.15 | ||||||||||||||||||
Low Tide / height (m) | 5:20PM -0.20 | 5:39AM -0.10 | 6:03PM -0.08 | 6:24AM -0.05 | 6:48PM 0.16 | |||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| Sunrise | - | 6:13 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:24 | - | - |
 |  |  | | |  | | | | | | | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 9 | 8 | 7 | 8 | 9 | 10 | 9 | 8 | 8 | 8 | 8 | 9 | 11 | 11 | 11 | 10 | 10 |
| Feels °C (?) | 3 | 3 | 4 | 4 | 5 | 6 | 8 | 7 | 5 | 4 | 5 | 5 | 6 | 5 | 4 | 4 | 4 | 5 | 6 | 9 | 8 | 8 | 6 | 6 |
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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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