Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 0.5ft (0.1m), 14s period with SW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 0.5ft (0.1m), 13s period with SW swell.
- Evening surf: Evening surf (21 Aug, local time) - 0.5ft (0.1m), 13s period with SW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 8AM is: 0.1m 14s primary swell from a Southwest direction and 0.1m 6s secondary swell from a Southwest direction (forecast issued at 12:00am August 21). An open ocean swell of 1.1m 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 (21 Aug) | 0.5ft (0.1m) | 14s |
| Afternoon (21 Aug) | 0.5ft (0.1m) | 13s |
| Evening (21 Aug) | 0.5ft (0.1m) | 13s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Very mild (max 16°C on Fri afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 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) | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 10 | 10 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross | cross | cross-off | off |
High Tide | 4:52AM4.29m | 5:32PM4.26m | 6:23AM4.10m | 7:07PM4.27m | 8:04AM4.17m | 8:27PM4.49m | ||||||||||||||||||
Low Tide | 10:37PM2.18m | 11:17AM2.31m | 11:58PM2.41m | 12:45PM2.45m | 1:37AM2.37m | 2:08PM2.34m | ||||||||||||||||||
 |  |  | |  |  |  |  | | | | | | | | | | | | | | | | | |
 | — | 6:07 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — | — | 6:11 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:34 | — | — | — | — | — | — | — | 8:31 | — | — | — | — | — | — | — | 8:29 | — |
mm | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 14 | 15 | 16 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 15 | 16 | 15 |
Feels °C | 8 | 8 | 8 | 10 | 11 | 13 | 11 | 12 | 10 | 10 | 9 | 9 | 9 | 10 | 11 | 12 | 13 | 12 | 13 | 14 | 12 | 13 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | W 4 | — | SW 13 | SW 13 | SW 13 | SW 13 | SW 15 | SW 15 | SW 15 | SW 15 | N 5 | N 5 | N 4 | N 4 | N 4 | N 4 | N 4 | N 4 | SW 13 |
| kJ | 3 | 1 | 1 | 1 | 1 | 1 | — | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 11 | 11 | 6 | 6 | 3 | 3 | 1 | 1 | 7 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 6 | SW 13 | SW 5 | S 5 | SW 16 | SW 16 | — | S 12 | — | S 12 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | — |
| kJ | 8 | 8 | 7 | 7 | 7 | 1 | 7 | 1 | 1 | 10 | 10 | — | 3 | — | 3 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 13 | SW 6 | — | — | — | — | — | — | — | — | S 12 | SW 12 | SW 12 | S 12 | — | — | — | — | — |
| kJ | — | — | — | — | — | 7 | 1 | — | — | — | — | — | — | — | — | 3 | 6 | 6 | 3 | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 4 | N 4 | N 4 | N 3 | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | — | — | — | — | — | — | — | NNW 4 | — |
| kJ | 53 | 58 | 59 | 46 | 23 | 13 | 7 | 6 | 21 | 33 | 26 | 24 | 26 | 25 | 17 | — | — | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 192 | 179 | 179 | 192 | 326 | 284 | 208 | 179 | 219 | 219 | 187 | 184 | 208 | 284 | 287 | 208 | 187 | 187 | 208 | 182 | 163 | 292 | 287 | 195 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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