Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (18 Sep):
- Morning surf: Morning surf (18 Sep, local time) - 4ft (1.2m), 5s period with SW swell.
- Afternoon surf: Afternoon surf (18 Sep, local time) - 7.5ft (2.3m), 6s period with SW swell.
- Evening surf: Evening surf (18 Sep, local time) - 7ft (2.2m), 7s period with SW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 3AM is: 1.5m 5s primary swell from a West direction (forecast issued at 12:00am September 18). An open ocean swell of 0.1m 15s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Sep) | 4ft (1.2m) | 5s |
| Afternoon (18 Sep) | 7.5ft (2.3m) | 6s |
| Evening (18 Sep) | 7ft (2.2m) | 7s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 5mm), mostly falling on Fri afternoon. Very mild (max 17°C on Fri night, min 12°C on Sat night). Winds decreasing (near gales from the SW on Fri afternoon, light winds from the WSW by Sun afternoon). | ||||||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 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) | W 5 | 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 | W 5 | W 5 | WNW 5 | NW 5 | NW 5 | NW 5 | SSW 6 | SSW 3 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 146 | 104 | 90 | 71 | 195 | 696 | 606 | 507 | 612 | 645 | 472 | 318 | 228 | 149 | 118 | 50 | 75 | 100 | 69 | 49 | 28 | 18 | 13 | 7 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on |
High Tide | 3:10AM4.60m | 3:35PM4.56m | 4:07AM4.26m | 4:41PM4.33m | 5:37AM4.04m | 6:15PM4.27m | ||||||||||||||||||
Low Tide | 9:24AM2.12m | 9:53PM2.22m | 10:24AM2.47m | 11:11PM2.48m | 11:54AM2.66m | |||||||||||||||||||
 |  |  | | |  | | | | | |  | | | |  | | |  | | | | | | |
 | — | 6:56 | — | — | — | — | — | — | — | 6:56 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 7:28 | — | — | — | — | — | — | — | 7:24 | — | — | — | — | — | — | — | 7:22 | — |
mm | — | — | — | — | — | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 13 | 12 | 12 | 12 | 12 | 13 | 13 |
Feels °C | 6 | 7 | 9 | 8 | 6 | 6 | 9 | 11 | 9 | 9 | 10 | 10 | 11 | 11 | 11 | 9 | 8 | 7 | 6 | 7 | 9 | 9 | 9 | 8 |
Swell 1 Height (m) Direction Period (s) | N 15 | N 15 | N 15 | NW 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 6 | SW 6 | SW 6 | NW 5 | NNW 5 | NNW 5 |
| kJ | 4 | 4 | 4 | 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 29 | 30 | 18 | 15 | 5 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | S 14 | S 14 | S 14 | S 14 | WNW 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 4 | 4 | 4 | 4 | 3 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 | SW 14 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 8 | — | — |
Wind waves Height (m) Direction Period (s) | W 5 | 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 | W 5 | W 5 | WNW 5 | NW 5 | NW 5 | SW 6 | SSW 6 | SSW 3 |
| kJ | 146 | 104 | 90 | 71 | 195 | 696 | 606 | 507 | 612 | 645 | 472 | 318 | 228 | 149 | 118 | 50 | 75 | 100 | 69 | 49 | 28 | 18 | 13 | 7 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 195 | 514 | 251 | 514 | 376 | 376 | 376 | 376 | 514 | 503 | 503 | 280 | 556 | 51 | 280 | 51 | 259 | 178 | 179 | 178 | 51 | 163 | 163 | 246 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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