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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 14 Sep 2025 BST
How big are the waves at Llanddwyn Island today?
The current surf forecast for Llanddwyn Island at 12PM is: 0.8m 6s primary swell from a Southwest direction and 0.1m 4s secondary swell from a Northwest direction, 0.9m 4s secondary swell from a South-southeast direction (forecast issued at 06:00am September 14). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Sep) | 3.5ft (1.0m) | 4s |
| Afternoon (14 Sep) | 3.5ft (1.1m) | 6s |
| Evening (14 Sep) | 8ft (2.5m) | 8s |
Table - waves today at Llanddwyn Island. (Swell directed towards the surf break)
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| 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) (?) | 7 | 7 | 4 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 89 | 75 | 39 | 72 | 131 | 432 | 755 | 1060 | 1603 | 2133 | 2460 | 1755 | 1543 | 882 | 658 | 592 | 483 | 389 | 255 | 181 | 135 | 80 | 61 | 69 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross | cross | on | on | on | on | on | 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 |
High Tide / height (m) | 2:38PM 3.35 | 3:24AM 3.17 | 4:01PM 3.11 | 5:15AM 2.95 | 5:51PM 3.10 | |||||||||||||||||||
Low Tide / height (m) | 9:17AM 0.93 | 9:52PM 0.94 | 10:32AM 1.24 | 11:20PM 1.09 | 12:02PM 1.31 | 12:51AM 0.98 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| Sunrise | - | 6:48 | - | - | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 7:37 | - | - | - | - | - | - | - | 7:34 | - | - | - | - | - | - | - | 7:31 | - | - |
 |  | |  |  | |  |  | | | | | | | |  | | |  | |  | | | | |
Rain (mm) | - | - | - | 3 | 3 | 2 | 1 | 1 | 1 | - | - | 1 | 2 | 1 | - | - | - | - | - | 1 | - | - | - | - |
| Temp. °C | 13 | 13 | 14 | 13 | 14 | 16 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 14 |
| Feels °C (?) | 11 | 10 | 9 | 8 | 8 | 9 | 7 | 5 | 4 | 4 | 3 | 4 | 4 | 5 | 5 | 4 | 4 | 5 | 7 | 8 | 9 | 11 | 12 | 11 |
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Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Wales - Anglesy
The wind is still cross-on at Llanddwyn Island (moderate winds from the S.(Wind varies from 140 to 200 degs) at Caernarfon Airport 7 km from Llanddwyn Island). 0.9m 4s local chop from the SW with a 0.3m 6s windswell from the W and a 0.2m 4s local chop from the NW. 3 swells combining to make bigger set waves.
2 h 12 min ago
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