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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 11 pm Sunday 08 Mar 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
8.4° C
(Which is 1.0°C warmer than normal for this time of year)How big are the waves at Trearddur Bay (Holy Island) today?
The current surf forecast for Trearddur Bay (Holy Island) at 6AM is: 0.6m 4s primary swell from a South-southwest direction and 0.1m 8s secondary swell from a Southwest direction, 0.1m 11s secondary swell from a Southwest direction (forecast issued at 11:00pm March 08). The wind direction is predicted to be cross-onshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Mar) | 2.5ft (0.8m) | 5s |
| Afternoon (09 Mar) | 2.5ft (0.7m) | 4s |
| Evening (09 Mar) | 2.5ft (0.7m) | 4s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 09 | Tuesday 10 | Wednesday 11 | ||||||||||||||||||||||
| 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 | 3 PM | 6 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 4 | 4 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 6 | 6 | 7 | 7 | 8 | 8 | 7 | 6 | 6 | 6 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 6 | 6 | 7 | 13 | 24 | 23 | 15 | 13 | 16 | 19 | 12 | 36 | 154 | 305 | 514 | 907 | 1204 | 699 | 421 | 256 | 249 | 173 | 119 | 169 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on |
High Tide / height (m) | 1:20AM 4.97 | 1:37PM 4.89 | 1:57AM 4.73 | 2:18PM 4.56 | 2:44AM 4.46 | 3:14PM 4.22 | ||||||||||||||||||
Low Tide / height (m) | 7:15PM 1.31 | 7:27AM 1.45 | 7:51PM 1.67 | 8:07AM 1.80 | 8:33PM 2.05 | 8:59AM 2.15 | ||||||||||||||||||
Monday 09 | Tuesday 10 | Wednesday 11 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 6:48 | - | - | - | - | - | - | - | 6:46 | - | - | - | - | - | - | - | 6:43 | - | - | - |
| Sunset | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:12 | - | - | - | - | - | - | - | 6:14 |
 | |  |  |  | |  | | | | | | | | |  | |  |  | |  | | | | |
Rain (mm) | 1 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 5 | 1 | - | - | - | - | - | - |
| Temp. °C | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 10 | 8 | 7 | 7 | 8 | 8 | 9 |
| Feels °C (?) | 6 | 7 | 6 | 5 | 5 | 5 | 4 | 4 | 3 | 2 | 1 | 1 | -1 | -2 | -1 | -2 | -2 | 1 | -1 | -2 | -1 | 0 | -1 | 0 |
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