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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 12 am Tuesday 31 Mar 2026 BSTForecast 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
8.7° 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: 0.7m 4s primary swell from a West-northwest direction and 0.2m 6s secondary swell from a South-southwest direction (forecast issued at 12:00am March 31). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Mar) | 2ft (0.6m) | 4s |
| Afternoon (31 Mar) | 2ft (0.6m) | 4s |
| Evening (31 Mar) | 1.5ft (0.4m) | 4s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 31 | Wednesday 01 | Thursday 02 | ||||||||||||||||||||||
| 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 | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 6 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 6 | 6 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 4 | 5 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 21 | 26 | 16 | 18 | 11 | 10 | 12 | 7 | 4 | 4 | 8 | 15 | 9 | 15 | 41 | 51 | 25 | 11 | 14 | 12 | 9 | 9 | 5 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | cross- on | cross- on | on | cross- on | cross- on | on | cross- on | cross- on | on | on | on | on | on | on | cross- off | cross- off | cross | cross- off | cross- off | cross- off | cross | cross- on |
High Tide / height (m) | 10:03PM 5.18 | 10:16AM 5.50 | 10:39PM 5.31 | 10:52AM 5.60 | 11:12PM 5.39 | 11:26AM 5.61 | ||||||||||||||||||
Low Tide / height (m) | 3:59AM 1.16 | 4:25PM 0.70 | 4:36AM 0.93 | 5:01PM 0.61 | 5:11AM 0.79 | 5:34PM 0.62 | ||||||||||||||||||
Tuesday 31 | Wednesday 01 | Thursday 02 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:54 | - | - | - | - | - | - | - | 6:52 | - | - | - | - | - | - | - | 6:50 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 7:50 | - | - | - | - | - | - | - | 7:52 | - | - | - | - | - | - | - | 7:53 |
 | | |  | |  | | |  | | | | | | | |  | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 11 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 7 | 6 | 5 | 6 | 6 | 6 | 6 | 6 |
| Feels °C (?) | 7 | 7 | 7 | 9 | 9 | 8 | 7 | 8 | 7 | 7 | 7 | 7 | 6 | 5 | 4 | 6 | -2 | -3 | -3 | -1 | 0 | 2 | 3 | 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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