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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 Saturday 29 Nov 2025 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
11.5° C
(Which is 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 4AM is: 0.5m 8s primary swell from a Southwest direction and 0.1m 14s secondary swell from a Southwest direction (forecast issued at 11:00pm November 29). An open ocean swell of 1.8m 6s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Nov) | 1.5ft (0.4m) | 8s |
| Afternoon (30 Nov) | 2.5ft (0.7m) | 4s |
| Evening (30 Nov) | 6.5ft (2.0m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 30 | Monday 01 | Tuesday 02 | ||||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 4 | 4 | 6 | 8 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 47 | 34 | 33 | 23 | 20 | 15 | 11 | 27 | 267 | 1310 | 2109 | 2498 | 2484 | 2646 | 2936 | 2459 | 1495 | 895 | 727 | 181 | 357 | 282 | 300 | 81 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross | cross | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | on | cross- on | cross- on | cross- on | on | on | on | on | on | on | on | on | on |
High Tide / height (m) | 5:44AM 4.64 | 5:58PM 5.03 | 6:45AM 4.88 | 6:57PM 5.26 | 7:37AM 5.15 | |||||||||||||||||||
Low Tide / height (m) | 11:19PM 1.72 | 11:45AM 2.03 | 12:21AM 1.47 | 12:46PM 1.74 | 1:16AM 1.21 | 1:40PM 1.41 | ||||||||||||||||||
Sunday 30 | Monday 01 | Tuesday 02 | ||||||||||||||||||||||
| Sunrise | - | - | - | - | 8:07 | - | - | - | - | - | - | - | 8:08 | - | - | - | - | - | - | - | 8:10 | - | - | - |
| Sunset | - | - | - | - | - | - | 4:05 | - | - | - | - | - | - | - | 4:04 | - | - | - | - | - | - | - | 4:04 | - |
 |  |  | |  | |  | |  | |  | |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 2 | 4 | 6 | 8 | 4 | 3 | 3 | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 10 | 10 | 12 | 13 | 13 | 13 | 13 | 10 | 9 | 10 | 9 | 9 | 10 | 10 | 10 | 9 |
| Feels °C (?) | -1 | -2 | -2 | 0 | 2 | 3 | 1 | 1 | -1 | -2 | 1 | 3 | 3 | 1 | 0 | -2 | -1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 |
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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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