Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (18 Aug):
- Morning surf: Morning surf (18 Aug, local time) - 3.5ft (1.1m), 4s period with W swell.
- Afternoon surf: Afternoon surf (18 Aug, local time) - 2ft (0.6m), 6s period with SW swell.
- Evening surf: Evening surf (18 Aug, local time) - 2ft (0.6m), 3s period with WSW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 8AM is: 0.7m 5s primary swell from a Southwest direction and 0.4m 7s secondary swell from a Southwest direction, 0.7m 4s secondary swell from a West-northwest direction (forecast issued at 12:00am August 18). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | 3.5ft (1.1m) | 4s |
| Afternoon (18 Aug) | 2ft (0.6m) | 6s |
| Evening (18 Aug) | 2ft (0.6m) | 3s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 19mm), heaviest on Mon night. Very mild (max 18°C on Mon night, min 14°C on Thu morning). Winds increasing (light winds from the SW on Tue afternoon, fresh winds from the NNE by Thu morning). | ||||||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||||||||||
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 5 | WSW 5 | SW 5 | W 4 | W 4 | SW 6 | SW 6 | WSW 3 | WSW 4 | WSW 4 | WSW 4 | WSW 4 | SW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 14 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 38 | 42 | 24 | 48 | 40 | 21 | 16 | 7 | 16 | 33 | 39 | 37 | 41 | 65 | 88 | 75 | 52 | 45 | 28 | 16 | 14 | 8 | 8 | 8 |
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 | on | on | cross-on | on | cross-on | on | on | on | on | on | cross-on | cross-on | cross | cross | cross-off | cross-off | off | cross-off | cross-off |
High Tide | 2:28AM5.33m | 2:51PM4.93m | 3:07AM4.98m | 3:32PM4.68m | 3:52AM4.62m | 4:23PM4.44m | ||||||||||||||||||
Low Tide | 8:44AM1.19m | 8:54PM1.47m | 9:26AM1.59m | 9:39PM1.83m | 10:14AM1.98m | |||||||||||||||||||
 |  |  | |  | | | | |  |  |  | | |  | |  | | | | | | | | |
 | — | 6:01 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:37 | — | — | — | — | — | — | — | 8:36 | — |
mm | 1 | — | — | — | — | — | — | 1 | 1 | — | — | 1 | — | — | 1 | 1 | 1 | 1 | 2 | 2 | 1 | — | — | — |
Temp °C | 18 | 17 | 16 | 16 | 16 | 17 | 17 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 17 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | 15 |
Feels °C | 16 | 13 | 12 | 12 | 12 | 14 | 15 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 13 | 13 | 12 | 12 | 12 | 11 | 7 | 9 | 11 | 13 |
Swell 1 Height (m) Direction Period (s) | — | — | SW 5 | — | — | NW 4 | NW 4 | NNW 4 | — | S 17 | SW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SSW 6 |
| kJ | — | — | 24 | — | — | 11 | 5 | 1 | — | 6 | 11 | 10 | 10 | 9 | 9 | 10 | 52 | 45 | 28 | 16 | 14 | 6 | 6 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 |
| kJ | — | — | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | S 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 5 | WSW 5 | WNW 4 | W 4 | W 4 | SW 6 | SW 6 | WSW 3 | WSW 4 | WSW 4 | WSW 4 | WSW 4 | SW 5 | SW 5 | SW 6 | SW 6 | W 4 | WNW 4 | NW 4 | N 4 | N 6 | N 6 | N 5 | N 4 |
| kJ | 38 | 42 | 15 | 48 | 40 | 21 | 16 | 7 | 16 | 33 | 39 | 37 | 41 | 65 | 88 | 75 | 6 | 13 | 20 | 39 | 146 | 92 | 32 | 19 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 548 | 388 | 179 | 51 | 376 | 589 | 548 | 251 | 193 | 195 | 195 | 246 | 246 | 246 | 235 | 235 | 51 | 51 | 179 | 179 | 179 | 208 | 195 | 192 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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