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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 23 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
10.0° C
(Which is 1.1°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 4AM is: 0.2m 4s primary swell from a South-southeast direction and 0.1m 9s secondary swell from a South direction (forecast issued at 12:00am April 23). An open ocean swell of 0.5m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Apr) | 1ft (0.3m) | 4s |
| Afternoon (23 Apr) | 1ft (0.3m) | 11s |
| Evening (23 Apr) | 1.5ft (0.5m) | 10s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 16°C on Thu afternoon, min 10°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | ||||||||||||||||||||||
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 | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
S 10 | S 9 | S 9 | SE 5 | SE 4 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | |
2 | 2 | 2 | 5 | 6 | 18 | 51 | 79 | 77 | 76 | 76 | 106 | 119 | 119 | 92 | 94 | 92 | 87 | 84 | 84 | 84 | 64 | 48 | 47 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-on | off | cross-off | cross-off | cross-off | cross | glassy | cross-off | cross-off | cross-off | glassy | glassy | glassy | glassy | glassy | on | cross-on | glassy | glassy | |
High Tide | 3:10AM5.02m | 3:58PM4.74m | 4:22AM4.78m | 5:21PM4.51m | 5:47AM4.68m | 6:48PM4.51m | ||||||||||||||||||
Low Tide | 9:36AM1.31m | 10:01PM1.87m | 10:52AM1.54m | 11:22PM2.07m | 12:17PM1.57m | |||||||||||||||||||
 |  |  | |  | | |  | | | | | | | | | | |  | | | | | | |
 | — | 6:01 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:31 | — | — | — | — | — | — | — | 8:34 | — | — | — | — | — | — | — | 8:35 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 10 | 10 | 11 | 11 | 14 | 15 | 16 | 15 | 14 | 13 | 12 | 13 | 14 | 15 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
5 | 4 | 5 | 6 | 12 | 13 | 14 | 12 | 12 | 11 | 10 | 11 | 11 | 12 | 12 | 13 | 12 | 11 | 11 | 11 | 11 | 10 | 11 | 11 | |
Swell 1 Height (m) Direction Period (s) | NE 5 | SSE 4 | SSE 4 | SE 5 | SSE 5 | NE 5 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 | SW 10 |
 kJ | 10 | 2 | 2 | 5 | 4 | 3 | 51 | 79 | 77 | 76 | 76 | 106 | 119 | 119 | 92 | 94 | 92 | 87 | 84 | 84 | 84 | 64 | 48 | 47 |
Swell 2 Height (m) Direction Period (s) | SSE 4 | S 9 | S 6 | NE 5 | NE 5 | SW 11 | NE 4 | NE 4 | NE 4 | NE 4 | NE 4 | NE 4 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 1 | 4 | 4 | 18 | 3 | 3 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | S 10 | — | S 9 | S 6 | SSW 6 | S 4 | — | S 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | — | 2 | 3 | 4 | 2 | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 3 | NE 5 | ENE 5 | — | SE 4 | — | — | SE 3 | SE 3 | SE 4 | SE 3 | ESE 3 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 13 | 10 | — | 6 | — | — | 1 | 2 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 383 | 382 | 382 | 568 | 536 | 51 | 8 | 0 | 0 | 0 | 125 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 51 | 51 | 51 | 51 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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