Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 1.5ft (0.5m), 6s period with SW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 1.5ft (0.4m), 6s period with SW swell.
- Evening surf: Evening surf (20 Aug, local time) - 1ft (0.3m), 6s period with SW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 5AM is: 0.7m 6s primary swell from a Southwest direction and 0.1m 15s secondary swell from a Southwest direction, 0.7m 4s secondary swell from a Northwest direction (forecast issued at 12:00am August 20). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 1.5ft (0.5m) | 6s |
| Afternoon (20 Aug) | 1.5ft (0.4m) | 6s |
| Evening (20 Aug) | 1ft (0.3m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 16mm), heaviest on Wed night. Very mild (max 16°C on Wed night, min 13°C on Thu night). Winds decreasing (fresh winds from the N on Thu morning, light winds from the NE by Fri afternoon). | ||||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | ||||||||||||||||||||||
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 6 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | 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 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 46 | 52 | 29 | 16 | 14 | 10 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 10 | 10 | 8 | 8 | 8 | 8 | 8 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross-off | 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 | cross-off | cross-off |
High Tide | 3:52AM4.62m | 4:23PM4.44m | 4:52AM4.29m | 5:32PM4.26m | 6:23AM4.10m | 7:07PM4.27m | ||||||||||||||||||
Low Tide | 10:14AM1.98m | 10:37PM2.18m | 11:17AM2.31m | 11:58PM2.41m | 12:45PM2.45m | |||||||||||||||||||
 | |  |  | |  | |  | |  |  |  | | | | | | | | | | | | | |
 | — | 6:05 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:36 | — | — | — | — | — | — | — | 8:34 | — | — | — | — | — | — | — | 8:31 | — |
mm | 2 | 3 | 3 | 3 | 2 | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 14 | 15 | 15 | 14 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 15 |
Feels °C | 11 | 10 | 12 | 10 | 9 | 10 | 9 | 9 | 7 | 8 | 9 | 9 | 11 | 13 | 10 | 9 | 9 | 10 | 10 | 10 | 9 | 11 | 13 | 14 |
Swell 1 Height (m) Direction Period (s) | SW 6 | SW 7 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 6 | SW 6 | SW 6 | SW 6 | SW 6 | W 4 | SW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 15 | — | NNW 5 | NNW 5 | NNW 4 |
| kJ | 46 | 52 | 29 | 16 | 14 | 10 | 6 | 6 | 4 | 1 | 1 | 1 | 1 | 1 | 7 | 7 | 7 | 7 | 7 | 8 | — | 19 | 7 | 7 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 6 | SW 6 | S 5 | — | SW 16 | SW 16 | — | SW 15 | SW 15 | — | SW 15 |
| kJ | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 1 | 1 | 1 | — | 10 | 10 | — | 8 | 8 | — | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 13 | — | — | — | — | — | — | — | — | SW 15 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — | — | — | — | — | — | — | — | 8 | — |
Wind waves Height (m) Direction Period (s) | WNW 4 | NW 4 | NW 4 | NNW 4 | N 5 | N 5 | N 5 | N 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 4 | NNW 4 | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NW 5 | WNW 3 | — |
| kJ | 10 | 16 | 24 | 31 | 83 | 76 | 62 | 64 | 102 | 87 | 58 | 39 | 24 | 10 | 8 | 24 | 40 | 35 | 26 | 25 | 26 | 6 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 51 | 51 | 8 | 284 | 195 | 838 | 284 | 193 | 192 | 192 | 192 | 192 | 195 | 284 | 208 | 273 | 184 | 219 | 187 | 178 | 184 | 273 | 267 | 163 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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