Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (17 Aug):
- Morning surf: Morning surf (17 Aug, local time) - 1.5ft (0.4m), 4s period with SW swell.
- Afternoon surf: Afternoon surf (17 Aug, local time) - 1ft (0.3m), 5s period with SW swell.
- Evening surf: Evening surf (17 Aug, local time) - 2ft (0.6m), 4s period with SSW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 6PM is: 0.3m 5s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West-northwest direction, 0.3m 3s secondary swell from a Northwest direction (forecast issued at 12:00pm August 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | 1.5ft (0.4m) | 4s |
| Afternoon (17 Aug) | 1ft (0.3m) | 5s |
| Evening (17 Aug) | 2ft (0.6m) | 4s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Mon night. Very mild (max 18°C on Mon night, min 14°C on Tue night). Mainly fresh winds. | |||||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||||
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 5 | SW 5 | SW 5 | SW 5 | SSW 4 | SW 4 | WSW 4 | SW 5 | WSW 4 | SW 6 | SW 6 | SW 6 | WSW 3 | WSW 4 | WSW 4 | WSW 4 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 6 | 4 | 4 | 14 | 22 | 26 | 18 | 31 | 23 | 17 | 16 | 9 | 24 | 37 | 35 | 49 | 74 | 63 | 89 | 124 |
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 | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | cross-on |
High Tide | 2:12PM5.16m | 2:28AM5.33m | 2:51PM4.93m | 3:07AM4.98m | 3:32PM4.68m | ||||||||||||||||
Low Tide | 8:05AM0.82m | 8:13PM1.14m | 8:44AM1.19m | 8:54PM1.47m | 9:26AM1.59m | 9:39PM1.83m | |||||||||||||||
 | | | |  | |  | | | | | | |  | |  |  | |  | |  | |
 | 6:01 | — | — | — | — | — | 6:01 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | — | 8:43 | — | — | — | — | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:37 | — |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 |
Temp °C | 15 | 16 | 16 | 16 | 16 | 18 | 17 | 16 | 16 | 16 | 17 | 18 | 17 | 16 | 15 | 14 | 15 | 16 | 16 | 17 | 16 |
Feels °C | 14 | 16 | 15 | 14 | 11 | 16 | 13 | 12 | 12 | 13 | 14 | 15 | 12 | 11 | 10 | 8 | 9 | 10 | 11 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 5 | SW 5 | WNW 3 | — | — | — | SW 5 | — | SW 6 | NW 4 | NW 4 | — | — | S 17 | SW 17 | NW 5 | SW 16 | S 15 | SW 15 | SW 16 |
| kJ | 6 | 6 | 4 | 1 | — | — | — | 18 | — | 23 | 8 | 4 | — | — | 6 | 11 | 1 | 10 | 5 | 9 | 10 |
Swell 2 Height (m) Direction Period (s) | — | — | NW 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | — | — | — | — |
| kJ | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 3 | WNW 3 | WNW 3 | SW 5 | SSW 4 | SW 4 | WSW 4 | WNW 4 | WSW 4 | WNW 4 | SW 6 | SW 6 | WSW 3 | WSW 4 | WSW 4 | WSW 4 | SW 5 | SW 5 | SW 5 | SW 6 | SW 6 |
| kJ | 3 | 2 | 2 | 4 | 14 | 22 | 26 | 14 | 31 | 12 | 17 | 16 | 9 | 24 | 37 | 35 | 49 | 74 | 63 | 89 | 124 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 249 | 249 | 287 | 388 | 344 | 548 | 388 | 192 | 51 | 51 | 589 | 515 | 251 | 251 | 195 | 195 | 251 | 251 | 235 | 246 | 249 |
Best forecast wave conditions in Anglesy | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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