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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 am Thursday 19 Feb 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
8.1° 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 12PM is: 0.5m 14s primary swell from a Southwest direction and 0.7m 9s secondary swell from a South-southwest direction (forecast issued at 05:00am February 19). The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Feb) | 1.5ft (0.5m) | 14s |
| Afternoon (19 Feb) | 2.5ft (0.7m) | 9s |
| Evening (19 Feb) | 2ft (0.6m) | 9s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 19 | Friday 20 | Saturday 21 | Sun 22 | |||||||||||||||||||||
| 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) (?) | 9 | 9 | 14 | 14 | 9 | 9 | 9 | 5 | 5 | 6 | 7 | 7 | 8 | 8 | 8 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 53 | 68 | 100 | 97 | 73 | 53 | 59 | 54 | 60 | 240 | 670 | 598 | 579 | 504 | 470 | 199 | 341 | 335 | 268 | 361 | 573 | 646 | 574 | 479 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | off | off | cross- off | cross | cross- on | cross- on | cross- on | on | on | on | on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on |
High Tide / height (m) | 11:25AM 5.82 | 11:47PM 5.47 | 12:00PM 5.83 | 12:21AM 5.46 | 12:37PM 5.77 | |||||||||||||||||||
Low Tide / height (m) | 5:13AM 0.80 | 5:35PM 0.58 | 5:48AM 0.74 | 6:11PM 0.57 | 6:25AM 0.78 | 6:49PM 0.69 | ||||||||||||||||||
Thursday 19 | Friday 20 | Saturday 21 | Sun 22 | |||||||||||||||||||||
| Sunrise | - | - | 7:28 | - | - | - | - | - | - | - | 7:26 | - | - | - | - | - | - | - | 7:24 | - | - | - | - | - |
| Sunset | - | - | - | - | 5:36 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:39 | - | - | - |
 |  |  | |  | |  | | | |  | |  | | | | | | | | | | | | |
Rain (mm) | - | 1 | - | - | - | - | - | - | - | 1 | 1 | - | 4 | - | - | - | - | - | - | 2 | 4 | 1 | - | - |
| Temp. °C | 4 | 3 | 4 | 5 | 5 | 6 | 8 | 7 | 8 | 8 | 9 | 10 | 10 | 10 | 9 | 9 | 10 | 10 | 9 | 10 | 10 | 10 | 10 | 10 |
| Feels °C (?) | -2 | -3 | -2 | 1 | 1 | 2 | 1 | 1 | 1 | -3 | -1 | 1 | 1 | 3 | 2 | -1 | 2 | 3 | 2 | 3 | 1 | 2 | 2 | 4 |
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