Surf Forecasts:
How big are the waves at Trefor today (20 Aug):
- Morning surf: Morning surf (20 Aug, local time) - 2ft (0.6m), 6s period with SW swell.
- Afternoon surf: Afternoon surf (20 Aug, local time) - 3ft (0.9m), 4s period with NNW swell.
- Evening surf: Evening surf (20 Aug, local time) - 2.5ft (0.7m), 4s period with NNW swell.
The current surf forecast for Trefor at 11AM is: 0.5m 6s primary swell from a Southwest direction and 0.1m 15s secondary swell from a West direction, 0.7m 4s secondary swell from a Northwest direction (forecast issued at 06:00am August 20). The wind direction is predicted to be onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Aug) | 2ft (0.6m) | 6s |
| Afternoon (20 Aug) | 3ft (0.9m) | 4s |
| Evening (20 Aug) | 2.5ft (0.7m) | 4s |
Table - waves today at Trefor. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 7mm), mostly falling on Thu morning. Very mild (max 16°C on Thu morning, min 12°C on Thu night). Winds decreasing (fresh winds from the N on Thu morning, light winds from the NE by Sat night). | |||||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||||||||
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 7 | SW 5 | SW 6 | NNW 5 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | NW 5 | NW 5 | NW 5 | NW 5 | W 13 | NNW 4 | W 16 | W 16 | NNW 5 | NW 5 | NW 5 | NW 5 | NW 5 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 52 | 23 | 29 | 27 | 25 | 18 | 11 | 18 | 20 | 19 | 14 | 10 | 4 | 7 | 7 | 8 | 9 | 7 | 8 | 8 | 9 | 8 | 8 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | cross-on |
High Tide | 2:35PM2.72m | 3:12AM2.61m | 3:53PM2.53m | 4:48AM2.45m | 5:33PM2.53m | ||||||||||||||||||
Low Tide | 9:02AM1.19m | 9:26PM1.28m | 10:01AM1.43m | 10:49PM1.46m | 11:38AM1.52m | ||||||||||||||||||
 |  | | | |  |  |  | |  | | | | | | | | | | | | | | |
 | 6:05 | — | — | — | — | — | — | — | 6:07 | — | — | — | — | — | — | — | 6:09 | — | — | — | — | — | — |
 | — | — | — | — | — | 8:35 | — | — | — | — | — | — | — | 8:31 | — | — | — | — | — | — | — | 8:30 | — |
mm | 2 | 2 | 2 | 1 | 1 | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 15 | 16 | 16 | 15 | 14 | 13 | 12 | 13 | 14 | 15 | 16 | 16 | 13 | 12 | 12 | 12 | 13 | 14 | 14 | 15 | 15 |
Feels °C | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 10 | 11 | 13 | 14 | 12 | 10 | 9 | 10 | 9 | 11 | 10 | 10 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 7 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | WSW 6 | WSW 6 | SW 6 | NW 5 | NW 5 | W 4 | SW 6 | SW 6 | SW 13 | SW 13 | SW 13 | SW 15 | SW 15 | SW 15 | NNW 5 | NNW 5 |
| kJ | 52 | 23 | 29 | 19 | 10 | 10 | 6 | 3 | 3 | 1 | 14 | 10 | 3 | 1 | 1 | 7 | 7 | 7 | 8 | 8 | 8 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | W 15 | W 15 | W 15 | W 14 | W 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 6 | SW 6 | SW 6 | SW 13 | SW 13 | SW 6 | W 16 | — | W 6 | — | SW 12 | SW 15 | — |
| kJ | 5 | 4 | 4 | 4 | 4 | 8 | 8 | 8 | 8 | 7 | 1 | 1 | 1 | 7 | 7 | 1 | 5 | — | 1 | — | 6 | 8 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 14 | — | SW 13 | W 13 | W 13 | — | W 16 | W 16 | W 6 | W 6 | — | — | — | W 12 | SW 15 |
| kJ | — | — | — | — | — | — | — | — | 8 | — | 7 | 3 | 3 | — | 5 | 5 | 1 | 1 | — | — | — | 3 | 8 |
Wind waves Height (m) Direction Period (s) | WNW 4 | WNW 4 | NW 4 | NNW 5 | NNW 4 | NNW 4 | NNW 4 | NNW 4 | NW 5 | NW 5 | — | — | NNW 4 | NNW 4 | NNW 4 | NNW 4 | NNW 5 | NW 5 | NW 5 | NW 5 | NW 5 | WNW 3 | — |
| kJ | 8 | 11 | 17 | 27 | 25 | 18 | 11 | 18 | 20 | 19 | — | — | 4 | 6 | 4 | 8 | 9 | 6 | 6 | 6 | 9 | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 20 | 25 | 144 | 162 | 805 | 215 | 160 | 160 | 160 | 160 | 24 | 162 | 298 | 155 | 136 | 163 | 155 | 155 | 208 | 204 | 284 | 295 | 136 |
Best forecast wave conditions in Lleyn Peninsula | |||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||||
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