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Surf Forecasts:
Trearddur Bay (Holy Island) surfForecast / Wales – Anglesy / UK
48hr Weather and Surf, issued 5 am Friday 02 Jan 2026 GMTForecast update in hr min s Forecast update imminent
Trearddur Bay (Holy Island) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trearddur Bay (Holy Island) sea temperature is
9.5° C
(Which is slightly warmer than usual)How big are the waves at Trearddur Bay (Holy Island) today?
The current surf forecast for Trearddur Bay (Holy Island) at 8AM is: 0.1m 8s primary swell from a Southwest direction and 0.1m 13s secondary swell from a West direction (forecast issued at 05:00am January 02). An open ocean swell of 2.3m 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 (02 Jan) | 0.5ft (0.1m) | 13s |
| Afternoon (02 Jan) | 0.5ft (0.1m) | 12s |
| Evening (02 Jan) | 0.5ft (0.1m) | 11s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Friday 02 | Saturday 03 | Sunday 04 | Mon 05 | |||||||||||||||||||||
| 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 | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 9 | 10 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 7 | 7 | 3 | 3 | 6 | 6 | 5 | 5 | 4 | 10 | 25 | 24 | 23 | 23 | 30 | 29 | 27 | 26 | 25 | 25 | 25 | 9 | 9 | 9 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | cross- off |
High Tide / height (m) | 9:03AM 5.41 | 9:30PM 5.51 | 9:54AM 5.66 | 10:22PM 5.63 | 10:42AM 5.84 | 11:10PM 5.65 | ||||||||||||||||||
Low Tide / height (m) | 2:42AM 1.22 | 3:12PM 1.05 | 3:34AM 1.06 | 4:04PM 0.79 | 4:23AM 0.95 | 4:54PM 0.62 | ||||||||||||||||||
Friday 02 | Saturday 03 | Sunday 04 | Mon 05 | |||||||||||||||||||||
| Sunrise | - | - | 8:33 | - | - | - | - | - | - | - | 8:32 | - | - | - | - | - | - | - | 8:32 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:10 | - | - | - | - | - | - | - | 4:12 | - | - | - | - | - | - | - | 4:13 | - | - | - |
 |  |  |  | | | | | |  | | | |  | | | | | | | | | | | |
Rain (mm) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | - | 1 | 1 | 1 | - | 1 | - | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 2 |
| Temp. °C | 5 | 5 | 4 | 5 | 5 | 5 | 5 | 3 | 4 | 4 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 4 |
| Feels °C (?) | -5 | -7 | -7 | -6 | -7 | -6 | -7 | -9 | -7 | -8 | -7 | -6 | -7 | -7 | -7 | -6 | -6 | -5 | -4 | -4 | -5 | -4 | -4 | -4 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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