Surf Forecasts:
How big are the waves at Trearddur Bay (Holy Island) today (21 Sep):
- Morning surf: Morning surf (21 Sep, local time) - 2.5ft (0.8m), 4s period with SSW swell.
- Afternoon surf: Afternoon surf (21 Sep, local time) - 1.5ft (0.4m), 4s period with SSW swell.
- Evening surf: Evening surf (21 Sep, local time) - 0.5ft (0.1m), 13s period with S swell.
The current surf forecast for Trearddur Bay (Holy Island) at 9AM is: 0.8m 4s primary swell from a South-southwest direction and 0.1m 13s secondary swell from a South direction (forecast issued at 12:00am September 21). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | 2.5ft (0.8m) | 4s |
| Afternoon (21 Sep) | 1.5ft (0.4m) | 4s |
| Evening (21 Sep) | 0.5ft (0.1m) | 13s |
Table - waves today at Trearddur Bay (Holy Island). (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Very mild (max 19°C on Mon night, min 12°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 21 | Tuesday 22 | Wednesday 23 | ||||||||||||||||||||||
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 4 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | S 13 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | S 12 | S 12 | S 12 | SW 17 | SW 16 | SW 15 | SW 15 | SW 14 | W 13 | SW 12 | SW 12 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 12 | 15 | 18 | 19 | 10 | 6 | 5 | 4 | 7 | 10 | 6 | 5 | 3 | 3 | 3 | 3 | 12 | 10 | 9 | 8 | 8 | 6 | 6 | 6 |
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-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off |
High Tide | 7:31AM4.11m | 7:47PM4.46m | 8:39AM4.39m | 8:44PM4.77m | 9:21AM4.69m | 9:25PM5.08m | ||||||||||||||||||
Low Tide | 00:57AM2.46m | 1:32PM2.55m | 2:15AM2.16m | 2:33PM2.24m | 3:02AM1.80m | 3:15PM1.89m | ||||||||||||||||||
 | |  |  |  |  | |  | | | | | | | | | |  | | | | | | | |
 | — | — | 7:01 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — | — | — | 7:03 | — | — | — | — | — |
 | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:17 | — | — | — | — | — | — | — | 7:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — |
Temp °C | 14 | 14 | 14 | 15 | 16 | 18 | 18 | 19 | 17 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 15 | 13 | 12 | 13 | 14 | 13 | 13 |
Feels °C | 10 | 9 | 9 | 12 | 14 | 17 | 16 | 17 | 14 | 14 | 15 | 15 | 16 | 15 | 17 | 16 | 16 | 14 | 9 | 6 | 7 | 7 | 7 | 10 |
Swell 1 Height (m) Direction Period (s) | NNW 4 | — | — | S 13 | S 13 | S 13 | S 13 | S 13 | — | — | — | — | — | S 12 | S 12 | S 12 | SW 17 | SW 3 | SW 3 | — | SW 14 | SW 12 | SW 12 | SW 12 |
| kJ | 2 | — | — | 3 | 3 | 3 | 3 | 3 | — | — | — | — | — | 3 | 3 | 3 | 12 | 2 | 2 | — | 8 | 6 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | S 13 | S 13 | — | — | — | — | — | — | W 5 | — | — | SW 12 | SW 16 | SW 15 | SW 12 | SW 14 | W 13 | SW 7 | SW 7 |
| kJ | — | — | — | — | — | 3 | 3 | — | — | — | — | — | — | 1 | — | — | 6 | 10 | 9 | 6 | 8 | 4 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 5 | SW 12 | SW 12 | SW 15 | — | S 12 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 6 | 6 | 8 | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | SW 4 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 3 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 3 | SSW 3 | SW 3 | SW 3 | — | NW 3 | NNW 3 | NNW 5 | NNW 6 | N 6 | N 6 |
| kJ | 12 | 15 | 18 | 19 | 10 | 6 | 5 | 4 | 7 | 10 | 6 | 5 | 3 | 2 | 2 | 2 | 3 | — | 1 | 10 | 87 | 94 | 88 | 89 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 179 | 179 | 241 | 246 | 246 | 246 | 246 | 246 | 246 | 246 | 246 | 184 | 235 | 192 | 179 | 155 | 163 | 179 | 179 | 192 | 326 | 236 | 236 | 192 |
Best forecast wave conditions in Anglesy | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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