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Trearddur Bay (Holy Island) Surf Forecast
/ Wales – Anglesy (10 surf breaks) /
Surf Forecasts:
Trearddur Bay (Holy Island) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 6 pm Saturday 13 Sep 2025 BST
How big are the waves at Trearddur Bay (Holy Island) today?
The current surf forecast for Trearddur Bay (Holy Island) at 12AM is: 1.5m 5s primary swell from a West-southwest direction (forecast issued at 06:00pm September 13). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Sep) | 4ft (1.2m) | 4s |
| Afternoon (14 Sep) | 5ft (1.6m) | 6s |
| Evening (14 Sep) | 10ft (3.0m) | 8s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 5 | 5 | 7 | 7 | 4 | 5 | 6 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 7 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 265 | 238 | 157 | 113 | 104 | 77 | 54 | 129 | 212 | 883 | 989 | 1055 | 1829 | 2566 | 3120 | 2042 | 1422 | 874 | 771 | 669 | 537 | 428 | 335 | 235 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross | cross- on | on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on |
High Tide / height (m) | 2:55PM 5.15 | 3:27AM 5.14 | 3:55PM 4.83 | 4:39AM 4.73 | 5:16PM 4.59 | 6:17AM 4.50 | ||||||||||||||||||
Low Tide / height (m) | 9:10PM 1.34 | 9:40AM 1.64 | 10:17PM 1.72 | 10:53AM 2.07 | 11:45PM 1.96 | 12:26PM 2.26 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:48 | - | - | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:52 | - | - |
| Sunset | - | 7:39 | - | - | - | - | - | - | - | 7:37 | - | - | - | - | - | - | - | 7:35 | - | - | - | - | - | - |
 | |  |  | |  | |  | | |  | |  | | | |  | | |  | |  | |  | |
Rain (mm) | 1 | 1 | - | - | - | - | - | 2 | 1 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - | - | - | - | - | - |
| Temp. °C | 15 | 14 | 14 | 14 | 13 | 14 | 14 | 13 | 15 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 14 | 14 | 13 | 13 | 13 | 13 | 14 |
| Feels °C (?) | 7 | 7 | 8 | 10 | 10 | 10 | 7 | 6 | 5 | 7 | 6 | 5 | 3 | 2 | 2 | 3 | 4 | 3 | 4 | 2 | 2 | 3 | 4 | 6 |
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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 Trearddur Bay (Holy Island) (moderate winds from the W at Valley 6 km from Trearddur Bay (Holy Island)). 1.4m 5s windswell from the WSW with a 0.7m 7s swell from the SSW. 2 swells combining to make bigger set waves.
1 h 18 min ago
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