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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 Sunday 31 Aug 2025 BST
How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 8AM is: 2.3m 8s primary swell from a Southwest direction (forecast issued at 06:00am August 31). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Aug) | 7.5ft (2.3m) | 8s |
| Afternoon (31 Aug) | 8ft (2.5m) | 8s |
| Evening (31 Aug) | 8ft (2.5m) | 8s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Sunday 31 | Monday 01 | Tuesday 02 | Wed 03 | |||||||||||||||||||||
| 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) (?) | 8 | 8 | 7 | 8 | 8 | 9 | 8 | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
| Energy (?) | 636 | 598 | 621 | 750 | 857 | 1017 | 802 | 549 | 341 | 240 | 138 | 165 | 202 | 165 | 140 | 121 | 271 | 91 | 57 | 49 | 39 | 47 | 80 | 67 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | cross- on | cross | cross | on | glass | cross- on | cross- on |
High Tide / height (m) | 3:10PM 2.85 | 3:53AM 2.74 | 4:45PM 2.70 | 5:46AM 2.66 | 6:33PM 2.79 | |||||||||||||||||||
Low Tide / height (m) | 9:23AM 1.42 | 9:53PM 1.51 | 10:32AM 1.63 | 11:24PM 1.65 | 12:12PM 1.64 | |||||||||||||||||||
Sunday 31 | Monday 01 | Tuesday 02 | Wed 03 | |||||||||||||||||||||
| Sunrise | - | 6:24 | - | - | - | - | - | - | - | 6:26 | - | - | - | - | - | - | - | 6:28 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:09 | - | - | - | - | - | - | - | 8:07 | - | - | - | - | - | - | - | 8:05 | - | - |
 |  |  | | | |  | |  |  | | | | | | | | | |  | | |  | | |
Rain (mm) | - | - | 1 | 1 | - | 1 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | - | 1 | 1 | 1 | - | - | - | - | - |
| Temp. °C | 15 | 14 | 15 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 13 | 13 | 14 | 16 | 17 | 17 | 15 | 15 |
| Feels °C (?) | 8 | 7 | 7 | 8 | 7 | 7 | 8 | 8 | 10 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 10 | 10 | 12 | 15 | 16 | 17 | 14 | 12 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Wales - Anglesy
The wind is still cross-on at Llanddwyn Island (fresh winds from the SSW at Caernarfon Airport 7 km from Llanddwyn Island). A 2.2m swell from the SW
2 h 7 min ago
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