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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 6 pm Sunday 31 May 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
13.0° C
(Which is 1.5°C warmer than normal for this time of year)How big are the waves at Trearddur Bay (Holy Island) today (01 Jun):
- Morning surf: Morning surf (01 Jun, local time) - 5ft (1.5m), 6s period with SSW swell.
- Afternoon surf: Afternoon surf (01 Jun, local time) - 5ft (1.5m), 6s period with SSW swell.
- Evening surf: Evening surf (01 Jun, local time) - 4.5ft (1.4m), 6s period with SSW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 12AM is: 1.2m 5s primary swell from a South-southwest direction and 0.3m 12s secondary swell from a Southwest direction (forecast issued at 06:00pm May 31). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (01 Jun) | 5ft (1.5m) | 6s |
| Afternoon (01 Jun) | 5ft (1.5m) | 6s |
| Evening (01 Jun) | 4.5ft (1.4m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 14mm), heaviest on Sun night. Very mild (max 15°C on Tue night, min 12°C on Sun night). Winds increasing (light winds from the W on Mon night, strong winds from the S by Wed morning). | ||||||||||||||||||||||||
Sun 31 | Monday 1 | Tuesday 2 | Wed 3 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SW 12 | SW 12 | SW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | SW 7 | WSW 4 | SW 4 | SSW 5 | SSW 6 | SSW 7 | |
23 | 23 | 53 | 90 | 117 | 129 | 119 | 90 | 151 | 149 | 115 | 87 | 55 | 34 | 24 | 25 | 26 | 39 | 25 | 19 | 25 | 61 | 283 | 332 | |
Wind (km/h) | ||||||||||||||||||||||||
on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | |
High Tide | 11:28PM5.23m | 11:48AM4.99m | 00:02AM5.27m | 12:24PM4.95m | 00:38AM5.25m | |||||||||||||||||||
Low Tide | 5:16PM1.26m | 5:37AM1.23m | 5:51PM1.30m | 6:13AM1.23m | 6:26PM1.37m | 6:50AM1.27m | ||||||||||||||||||
 |  |  |  |  |  | | | | | | | | | | |  | |  | | | | | | |
 | — | — | — | — | 4:58 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — |
 | — | 9:34 | — | — | — | — | — | — | — | 9:35 | — | — | — | — | — | — | — | 9:36 | — | — | — | — | — | 9:37 |
— | — | — | — | 1 | 3 | 1 | 2 | 1 | 1 | — | — | 1 | 1 | — | — | — | — | — | — | — | — | 1 | 2 | |
Temp °C | 14 | 14 | 13 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 13 | 13 | 14 | 14 | 14 | 15 | 13 | 12 | 12 | 12 | 13 |
10 | 10 | 8 | 6 | 6 | 5 | 8 | 8 | 7 | 8 | 8 | 9 | 10 | 11 | 10 | 11 | 11 | 11 | 12 | 9 | 8 | 6 | 4 | 6 | |
Swell 1 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | SW 12 | SW 12 | SW 11 | SW 11 | SW 14 | SW 11 | SW 14 | SW 14 | SW 14 | SSW 6 | SW 6 | SSW 6 | SSW 6 | WNW 3 | — | SW 7 | — | — | WNW 4 | — | — |
 kJ | 23 | 23 | 23 | 34 | 23 | 19 | 5 | 8 | 4 | 8 | 8 | 8 | 55 | 34 | 24 | 25 | 1 | — | 25 | — | — | 1 | — | — |
Swell 2 Height (m) Direction Period (s) | SW 15 | — | — | — | — | SW 14 | SW 14 | SW 11 | SW 14 | SW 10 | SW 10 | W 10 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | — | — | — | — | — | — |
| kJ | 9 | — | — | — | — | 8 | 8 | 5 | 8 | 4 | 4 | 2 | 7 | 7 | 7 | 7 | 7 | 7 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SSW 4 | SW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SW 6 | — | WNW 3 | WNW 3 | SSW 6 | SW 6 | WSW 3 | WSW 4 | SW 4 | SSW 5 | SSW 6 | SSW 7 |
| kJ | 12 | 20 | 53 | 90 | 117 | 129 | 119 | 90 | 151 | 149 | 115 | 87 | 44 | — | 1 | 1 | 26 | 39 | 6 | 19 | 25 | 61 | 283 | 332 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 292 | 249 | 114 | 114 | 234 | 234 | 234 | 234 | 255 | 255 | 234 | 179 | 88 | 51 | 51 | 51 | 280 | 51 | 51 | 51 | 114 | 260 | 275 | 246 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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Ocean Swells (m)- Wind Speed (km/h)
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