Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (31 Aug):
- Afternoon surf: Afternoon surf (31 Aug, local time) - 2ft (0.6m), 8s period with SW swell.
- Evening surf: Evening surf (31 Aug, local time) - 1.5ft (0.5m), 8s period with SW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 11PM is: 0.5m 7s primary swell from a Southwest direction and 0.5m 4s secondary swell from a West direction (forecast issued at 06:00pm August 31). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (31 Aug) | - | - |
| Afternoon (31 Aug) | 2ft (0.6m) | 8s |
| Evening (31 Aug) | 1.5ft (0.5m) | 8s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Very mild (max 18°C on Wed night, min 15°C on Mon night). Winds increasing (light winds from the WNW on Tue night, strong winds from the S by Wed morning). | |||||||||||||||||||
Mon 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||||
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 8 | SSW 8 | SW 7 | SSW 7 | WSW 7 | SW 4 | SW 4 | SW 4 | SSW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SW 5 | SSW 5 | SSW 6 | SSW 6 | SW 6 | SSW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 50 | 41 | 27 | 21 | 46 | 12 | 23 | 31 | 61 | 98 | 64 | 38 | 25 | 24 | 40 | 148 | 184 | 152 | 137 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | on | on |
High Tide | 1:01PM5.41m | 1:15AM5.69m | 1:36PM5.36m | 1:53AM5.56m | 2:15PM5.23m | ||||||||||||||
Low Tide | 7:04PM0.89m | 7:26AM0.78m | 7:42PM1.01m | 8:06AM0.98m | 8:25PM1.22m | ||||||||||||||
 | |  |  | |  | | | |  |  |  | | |  | |  | | | |
 | — | — | — | — | 6:26 | — | — | — | — | — | — | — | 6:28 | — | — | — | — | — | — |
 | — | 8:10 | — | — | — | — | — | — | — | 8:08 | — | — | — | — | — | — | — | 8:06 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 2 | — | — | — | 1 | 1 | — | — | — |
Temp °C | 16 | 17 | 16 | 15 | 15 | 15 | 15 | 15 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 18 |
Feels °C | 12 | 13 | 13 | 12 | 11 | 10 | 10 | 10 | 12 | 11 | 16 | 15 | 14 | 12 | 11 | 10 | 12 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 8 | SSW 8 | SW 7 | SSW 7 | NNW 4 | NW 4 | — | — | — | — | — | SW 5 | — | — | S 16 | — | SW 16 | SW 16 | SW 15 |
| kJ | 50 | 41 | 27 | 21 | 3 | 4 | — | — | — | — | — | 38 | — | — | 5 | — | 10 | 9 | 9 |
Swell 2 Height (m) Direction Period (s) | N 5 | NNW 4 | NNW 4 | NNW 4 | — | N 4 | — | — | — | — | — | — | W 16 | — | — | — | — | — | — |
| kJ | 7 | 4 | 4 | 4 | — | 2 | — | — | — | — | — | — | 5 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 4 | W 4 | W 4 | W 3 | WSW 7 | SW 4 | SW 4 | SW 4 | SSW 5 | SW 5 | SW 5 | — | SW 5 | SW 5 | SSW 5 | SSW 6 | SSW 6 | SW 6 | SSW 6 |
| kJ | 23 | 10 | 7 | 6 | 46 | 12 | 23 | 31 | 61 | 98 | 64 | — | 25 | 24 | 40 | 148 | 184 | 152 | 137 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 51 | 51 | 51 | 51 | 179 | 179 | 290 | 323 | 319 | 292 | 251 | 246 | 246 | 246 | 260 | 249 | 278 | 275 | 287 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||
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