Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (21 Oct):
- Morning surf: Morning surf (21 Oct, local time) - 7.5ft (2.3m), 6s period with W swell.
- Afternoon surf: Afternoon surf (21 Oct, local time) - 10ft (3.0m), 7s period with WNW swell.
- Evening surf: Evening surf (21 Oct, local time) - 7.5ft (2.3m), 6s period with WNW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 6AM is: 1.6m 6s primary swell from a Southwest direction and 0.1m 14s secondary swell from a Southwest direction (forecast issued at 12:00am October 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Oct) | 7.5ft (2.3m) | 6s |
| Afternoon (21 Oct) | 10ft (3.0m) | 7s |
| Evening (21 Oct) | 7.5ft (2.3m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 19mm), heaviest on Fri morning. Very mild (max 12°C on Thu afternoon, min 8°C on Wed morning). Winds increasing (light winds from the S on Thu afternoon, gales from the NW by Fri morning). | ||||||||||||||||||||||||
Wednesday 21 | Thursday 22 | Friday 23 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 5 | S 6 | SW 6 | W 6 | W 7 | WNW 7 | WNW 7 | W 6 | W 6 | W 5 | WNW 5 | WSW 4 | SW 8 | SW 8 | SW 8 | SSW 8 | S 8 | SSW 6 | NW 7 | NW 7 | NW 7 | NW 7 | WNW 6 | WNW 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 37 | 146 | 182 | 424 | 940 | 924 | 597 | 328 | 181 | 90 | 51 | 26 | 109 | 109 | 95 | 84 | 129 | 68 | 650 | 754 | 621 | 453 | 426 | 479 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-on |
High Tide | 7:48AM4.35m | 7:52PM4.73m | 8:36AM4.65m | 8:39PM5.03m | 9:13AM4.95m | 9:18PM5.32m | ||||||||||||||||||
Low Tide | 1:20AM2.18m | 1:42PM2.36m | 2:14AM1.84m | 2:30PM2.01m | 2:54AM1.49m | 3:09PM1.64m | ||||||||||||||||||
 |  |  |  | | | | | | | |  | | | |  | |  | |  | |  | | | |
 | — | — | 7:54 | — | — | — | — | — | — | — | 7:56 | — | — | — | — | — | — | — | 7:58 | — | — | — | — | — |
 | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:06 | — | — |
mm | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | 1 | 3 | 3 | 2 | 6 | 1 | — | — | — |
Temp °C | 11 | 11 | 10 | 8 | 9 | 10 | 11 | 10 | 10 | 10 | 10 | 11 | 11 | 12 | 11 | 10 | 10 | 12 | 10 | 9 | 10 | 11 | 11 | 10 |
Feels °C | 5 | 5 | 1 | -3 | -3 | -2 | 1 | 2 | 3 | 4 | 4 | 5 | 6 | 8 | 6 | 4 | 4 | 8 | -1 | -5 | -3 | -1 | -1 | -1 |
Swell 1 Height (m) Direction Period (s) | SW 5 | — | SW 14 | — | SW 14 | — | — | — | — | — | SW 7 | SW 7 | NW 4 | NW 4 | SW 8 | SSW 8 | — | SSW 6 | SSW 8 | SW 8 | SSW 12 | SW 11 | SW 10 | — |
| kJ | 14 | — | 8 | — | 8 | — | — | — | — | — | 25 | 26 | 12 | 4 | 95 | 84 | — | 68 | 50 | 34 | 231 | 172 | 51 | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NNW 5 | — | NNW 5 | WNW 4 | — | — | SW 8 | — | SW 15 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 13 | — | 2 | 1 | — | — | 18 | — | 33 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 4 | — | — | NE 4 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 5 | S 6 | SW 6 | W 6 | W 7 | WNW 7 | WNW 7 | W 6 | W 6 | W 5 | WNW 5 | WSW 4 | SW 8 | SW 8 | — | ESE 3 | S 8 | — | NW 7 | NW 7 | NW 7 | NW 7 | WNW 6 | WNW 6 |
| kJ | 37 | 146 | 182 | 424 | 940 | 924 | 597 | 328 | 181 | 90 | 51 | 26 | 109 | 109 | — | 3 | 129 | — | 650 | 754 | 621 | 453 | 426 | 479 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 249 | 215 | 249 | 246 | 235 | 280 | 280 | 284 | 280 | 174 | 174 | 174 | 51 | 98 | 59 | 246 | 249 | 10 | 59 | 287 | 280 | 492 | 1015 | 408 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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