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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 Thursday 16 Apr 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
9.2° 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 9AM is: 1.9m 8s primary swell from a Southwest direction and 0.6m 14s secondary swell from a Southwest direction (forecast issued at 12:00am April 16). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Apr) | 6ft (1.9m) | 8s |
| Afternoon (16 Apr) | 5ft (1.5m) | 5s |
| Evening (16 Apr) | 5ft (1.5m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 16 | Friday 17 | Saturday 18 | ||||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 7 | 7 | 6 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1067 | 1401 | 1039 | 594 | 418 | 338 | 120 | 134 | 143 | 166 | 263 | 395 | 530 | 407 | 424 | 424 | 381 | 271 | 162 | 104 | 76 | 63 | 43 | 28 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | on | on | on | on | on | cross- on | cross- on | cross- on | cross- on | cross |
High Tide / height (m) | 10:04PM 5.18 | 10:14AM 5.54 | 10:39PM 5.43 | 10:52AM 5.75 | 11:16PM 5.60 | 11:32AM 5.86 | ||||||||||||||||||
Low Tide / height (m) | 4:03AM 0.98 | 4:23PM 0.59 | 4:41AM 0.69 | 5:02PM 0.41 | 5:20AM 0.50 | 5:42PM 0.37 | ||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:18 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:13 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:19 | - | - | - | - | - | - | - | 8:21 | - | - | - | - | - | - | - | 8:22 |
 |  |  |  |  | |  | |  |  | |  |  | | | | | | | | | | | | |
Rain (mm) | - | 1 | - | - | - | - | - | - | 1 | - | - | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 10 | 10 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 11 | 11 |
| Feels °C (?) | -1 | -1 | 0 | 2 | 3 | 3 | 3 | 4 | 4 | 2 | 1 | 1 | 2 | 1 | 1 | 2 | 1 | 2 | 4 | 3 | 3 | 4 | 7 | 7 |
- 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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