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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 Friday 17 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
9.4° C
(Which is slightly warmer than usual)How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 6AM is: 1.6m 6s primary swell from a South-southwest direction and 0.3m 13s secondary swell from a West-southwest direction, 0.2m 12s secondary swell from a West-southwest direction (forecast issued at 12:00am April 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Apr) | 5.5ft (1.7m) | 7s |
| Afternoon (17 Apr) | 5ft (1.6m) | 6s |
| Evening (17 Apr) | 5.5ft (1.7m) | 6s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||||||||||||
| 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 | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 14 | 6 | 6 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 10 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 104 | 93 | 159 | 247 | 303 | 285 | 198 | 217 | 224 | 190 | 113 | 80 | 58 | 38 | 24 | 26 | 21 | 15 | 9 | 10 | 6 | 5 | 5 | 5 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | cross- on | cross | cross | cross | cross | cross- off | off | off | off | cross- off | cross- off | cross- off | off |
High Tide / height (m) | 9:34PM 4.02 | 9:45AM 4.36 | 10:09PM 4.22 | 10:24AM 4.46 | 10:46PM 4.31 | 11:05AM 4.44 | ||||||||||||||||||
Low Tide / height (m) | 4:15AM 0.15 | 4:39PM -0.18 | 4:56AM -0.03 | 5:20PM -0.20 | 5:39AM -0.10 | 6:03PM -0.08 | ||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:09 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:20 | - | - | - | - | - | - | - | 8:22 | - | - | - | - | - | - | - | 8:22 |
 |  | |  |  |  |  | |  |  | | | | | | | | | |  | | | | | |
Rain (mm) | 1 | - | - | 2 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 10 | 10 | 10 | 9 | 8 | 7 | 8 | 9 | 10 | 9 |
| Feels °C (?) | 4 | 4 | 3 | 3 | 5 | 4 | 4 | 3 | 3 | 4 | 5 | 4 | 4 | 4 | 5 | 7 | 7 | 6 | 5 | 4 | 6 | 5 | 5 | 5 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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