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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 5 pm Friday 14 Nov 2025 GMT
How big are the waves at Trearddur Bay (Holy Island) today?
The current surf forecast for Trearddur Bay (Holy Island) at 11PM is: 0.4m 9s primary swell from a Southwest direction and 0.1m 7s secondary swell from a Southeast direction (forecast issued at 05:00pm November 14). An open ocean swell of 2.4m 7s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Nov) | - | - |
| Afternoon (14 Nov) | 1.5ft (0.5m) | 9s |
| Evening (14 Nov) | 1.5ft (0.4m) | 9s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||||||||
| 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 12 | 11 | 10 | 10 | 10 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 41 | 21 | 21 | 21 | 21 | 20 | 28 | 46 | 59 | 58 | 55 | 40 | 33 | 33 | 33 | 23 | 35 | 78 | 71 | 65 | 46 | 35 | 32 | 21 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | cross- off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | off | off | off |
High Tide / height (m) | 6:18PM 4.92 | 7:03AM 4.74 | 7:17PM 5.04 | 7:51AM 4.90 | 8:04PM 5.15 | 8:30AM 5.05 | ||||||||||||||||||
Low Tide / height (m) | 12:40AM 1.67 | 12:58PM 2.05 | 1:32AM 1.53 | 1:47PM 1.85 | 2:14AM 1.42 | |||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 7:41 | - | - | - | - | - | - | - | 7:43 | - | - | - | - | - | - | - | 7:45 | - |
| Sunset | 4:23 | - | - | - | - | - | - | - | 4:22 | - | - | - | - | - | - | - | 4:21 | - | - | - | - | - | - | - |
 |  |  | | | | |  | |  | |  | | |  | | | |  | | | |  | | |
Rain (mm) | 2 | 5 | 8 | 6 | 3 | 3 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 9 | 8 | 9 | 9 | 8 | 7 | 7 |
| Feels °C (?) | -5 | -6 | -5 | -4 | -3 | -1 | 2 | 4 | 4 | 4 | 4 | 2 | 2 | 2 | 1 | 2 | 3 | 3 | 2 | 3 | 3 | -1 | 0 | 1 |
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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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