Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (17 Sep):
- Morning surf: Morning surf (17 Sep, local time) - 6ft (1.8m), 6s period with W swell.
- Afternoon surf: Afternoon surf (17 Sep, local time) - 5.5ft (1.7m), 6s period with W swell.
- Evening surf: Evening surf (17 Sep, local time) - 5ft (1.6m), 6s period with W swell.
The current surf forecast for Trearddur Bay (Holy Island) at 10AM is: 1.8m 6s primary swell from a West direction (forecast issued at 06:00am September 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Sep) | 6ft (1.8m) | 6s |
| Afternoon (17 Sep) | 5.5ft (1.7m) | 6s |
| Evening (17 Sep) | 5ft (1.6m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Fri afternoon. Very mild (max 17°C on Fri night, min 13°C on Thu morning). Winds decreasing (near gales from the SW on Fri afternoon, moderate winds from the W by Sat afternoon). | |||||||||||||||||||||||
Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||||||||
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 6 | SW 7 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 5 | W 5 | SW 5 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | WSW 4 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 287 | 173 | 209 | 200 | 178 | 152 | 158 | 152 | 108 | 92 | 68 | 172 | 625 | 623 | 522 | 527 | 508 | 428 | 293 | 251 | 168 | 121 | 47 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:27AM4.94m | 2:48PM4.82m | 3:10AM4.60m | 3:35PM4.56m | 4:07AM4.26m | 4:41PM4.33m | |||||||||||||||||
Low Tide | 8:40AM1.73m | 8:59PM1.87m | 9:24AM2.12m | 9:53PM2.22m | 10:24AM2.47m | ||||||||||||||||||
 |  | |  |  | |  | |  | | | |  |  |  | | | | | | | | | |
 | 6:54 | — | — | — | — | — | — | — | 6:56 | — | — | — | — | — | — | — | 6:56 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:30 | — | — | — | — | — | — | — | 7:28 | — | — | — | — | — | — | — | 7:24 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | 6 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 13 | 14 | 15 | 15 | 14 | 13 | 14 | 14 | 14 | 15 | 15 | 16 | 17 | 16 | 16 | 17 | 15 | 16 | 16 | 16 | 15 |
Feels °C | 8 | 6 | 5 | 5 | 7 | 8 | 6 | 6 | 8 | 9 | 8 | 6 | 6 | 10 | 11 | 10 | 9 | 11 | 9 | 11 | 11 | 10 | 9 |
Swell 1 Height (m) Direction Period (s) | — | SW 7 | — | — | — | — | — | N 15 | N 15 | N 15 | NW 5 | NNW 5 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 173 | — | — | — | — | — | 4 | 4 | 4 | 16 | 3 | — | — | — | — | — | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | N 14 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 6 | WNW 5 | W 6 | W 6 | W 6 | W 6 | W 6 | W 6 | W 5 | W 5 | SW 5 | SW 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | SW 7 | WSW 4 |
| kJ | 287 | 90 | 209 | 200 | 178 | 152 | 158 | 152 | 108 | 92 | 68 | 172 | 625 | 623 | 522 | 527 | 508 | 428 | 293 | 251 | 168 | 121 | 47 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 280 | 280 | 285 | 548 | 548 | 548 | 179 | 179 | 376 | 278 | 250 | 556 | 556 | 376 | 251 | 514 | 514 | 503 | 280 | 280 | 280 | 51 | 219 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||||
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