Surf Forecasts:
How big are the waves at Trefor today (17 Aug):
- Morning surf: Morning surf (17 Aug, local time) - 1.5ft (0.5m), 5s period with SW swell.
- Afternoon surf: Afternoon surf (17 Aug, local time) - 1.5ft (0.4m), 5s period with SW swell.
The current surf forecast for Trefor at 3PM is: 0.4m 5s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West-northwest direction (forecast issued at 12:00pm August 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | 1.5ft (0.5m) | 5s |
| Afternoon (17 Aug) | 1.5ft (0.4m) | 5s |
| Evening (17 Aug) | - | - |
Table - waves today at Trefor. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Mon night. Very mild (max 18°C on Tue afternoon, min 14°C on Tue night). Wind will be generally light. | |||||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||||||
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 | SW 5 | SW 5 | SW 5 | SSW 3 | SW 4 | WSW 5 | SW 5 | WSW 6 | WSW 6 | NW 4 | W 16 | WSW 4 | WSW 4 | W 17 | WSW 4 | WSW 5 | SW 5 | SW 5 | SW 6 | SW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 12 | 9 | 7 | 4 | 0 | 0 | 0 | 22 | 47 | 37 | 5 | 5 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-on | cross-off | cross-off | cross-off | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross |
High Tide | 12:20PM3.42m | 00:39AM3.63m | 1:00PM3.21m | 1:21AM3.28m | 1:43PM2.97m | ||||||||||||||||
Low Tide | 7:07AM0.19m | 7:14PM0.45m | 7:43AM0.53m | 7:52PM0.73m | 8:20AM0.88m | 8:33PM1.02m | |||||||||||||||
 | |  | |  |  |  | | | | | | |  |  |  | | |  | | | |
 | 6:01 | — | — | — | — | — | 6:01 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | — | 8:40 | — | — | — | — | — | — | — | 8:38 | — | — | — | — | — | — | — | 8:37 | — |
mm | — | — | — | — | — | 2 | — | — | — | — | — | — | — | 1 | — | — | — | — | 1 | 2 | 1 |
Temp °C | 16 | 15 | 16 | 17 | 16 | 17 | 17 | 16 | 16 | 17 | 18 | 18 | 17 | 15 | 14 | 14 | 15 | 16 | 16 | 17 | 16 |
Feels °C | 16 | 15 | 15 | 15 | 13 | 16 | 15 | 14 | 14 | 14 | 16 | 16 | 13 | 11 | 11 | 10 | 10 | 11 | 12 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 5 | SW 5 | SW 5 | SW 5 | — | — | — | SW 5 | WSW 6 | W 16 | NW 4 | NW 4 | — | — | W 17 | — | — | — | — | — | — |
| kJ | 12 | 9 | 7 | 4 | — | — | — | 22 | 47 | 5 | 4 | 2 | — | — | 6 | — | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | — | — | WNW 3 | — | — | — | — | — | W 16 | — | W 16 | W 16 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | — | — | — | — | — | 5 | — | 5 | 5 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 3 | WNW 3 | — | — | SSW 3 | SW 4 | WSW 5 | NW 3 | — | WSW 6 | SW 6 | SW 6 | WSW 4 | WSW 4 | WSW 5 | WSW 4 | WSW 5 | SW 5 | SW 5 | SW 6 | SW 6 |
| kJ | 1 | 1 | — | — | 6 | 18 | 27 | 3 | — | 37 | 16 | 16 | 11 | 29 | 33 | 30 | 40 | 55 | 58 | 133 | 112 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 283 | 283 | 283 | 283 | 320 | 325 | 394 | 517 | 394 | 215 | 20 | 620 | 542 | 616 | 285 | 285 | 555 | 280 | 285 | 285 | 269 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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