Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 4ft (1.2m), 5s period with WNW swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 3ft (0.9m), 5s period with NW swell.
- Evening surf: Evening surf (20 Sep, local time) - 1.5ft (0.4m), 6s period with SSW swell.
The current surf forecast for Trearddur Bay (Holy Island) at 3AM is: 1.2m 5s primary swell from a West-northwest direction and 0.9m 7s secondary swell from a Southwest direction, 0.1m 14s secondary swell from a South direction (forecast issued at 12:00am September 20). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 4ft (1.2m) | 5s |
| Afternoon (20 Sep) | 3ft (0.9m) | 5s |
| Evening (20 Sep) | 1.5ft (0.4m) | 6s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 17°C on Mon afternoon, min 13°C on Sat night). Winds decreasing (fresh winds from the W on Sat night, light winds from the W by Sun afternoon). | ||||||||||||||||||||||||
Sunday 20 | Monday 21 | Tuesday 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) | WSW 5 | SW 7 | WNW 5 | NW 5 | NW 5 | NW 5 | NW 5 | SSW 6 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | S 12 | S 12 | S 12 | S 12 | S 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 97 | 72 | 80 | 66 | 42 | 24 | 12 | 13 | 9 | 20 | 28 | 32 | 19 | 16 | 11 | 13 | 15 | 10 | 7 | 5 | 4 | 6 | 4 | 4 |
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 | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 5:37AM4.04m | 6:15PM4.27m | 7:31AM4.11m | 7:47PM4.46m | 8:39AM4.39m | 8:44PM4.77m | ||||||||||||||||||
Low Tide | 11:11PM2.48m | 11:54AM2.66m | 00:57AM2.46m | 1:32PM2.55m | 2:15AM2.16m | 2:33PM2.24m | ||||||||||||||||||
 |  |  |  | |  | | | | |  | | | | | | | | | | | | | | |
 | — | 6:58 | — | — | — | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — |
 | — | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:17 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 16 | 17 | 17 | 17 | 16 | 16 | 15 | 15 | 16 | 16 | 16 | 16 |
Feels °C | 7 | 6 | 6 | 7 | 9 | 10 | 10 | 9 | 8 | 8 | 8 | 11 | 13 | 14 | 15 | 15 | 13 | 14 | 12 | 13 | 14 | 14 | 15 | 15 |
Swell 1 Height (m) Direction Period (s) | — | SW 7 | SW 6 | SW 6 | SW 6 | NW 5 | NW 5 | NW 4 | NNW 4 | — | — | S 13 | S 13 | S 13 | S 13 | S 13 | — | — | — | — | — | S 12 | S 12 | S 12 |
| kJ | — | 63 | 40 | 31 | 18 | 24 | 12 | 4 | 2 | — | — | 3 | 3 | 3 | 3 | 3 | — | — | — | — | — | 3 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | — | S 14 | S 14 | S 14 | S 14 | SW 6 | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — | S 12 | S 12 | SW 12 | W 5 | — |
| kJ | — | 4 | 4 | 4 | 4 | 18 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 3 | 6 | 1 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | S 14 | S 14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 4 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 5 | WNW 5 | WNW 5 | NW 5 | NW 5 | — | — | SSW 6 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 3 | SSW 3 | SSW 3 | SSW 3 | SSW 3 |
| kJ | 97 | 72 | 80 | 66 | 42 | — | — | 13 | 9 | 20 | 28 | 32 | 19 | 16 | 11 | 13 | 15 | 10 | 7 | 5 | 4 | 4 | 4 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 280 | 280 | 280 | 179 | 219 | 187 | 192 | 51 | 163 | 179 | 179 | 179 | 187 | 187 | 251 | 246 | 246 | 246 | 246 | 246 | 246 | 184 | 187 | 192 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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