Surf Forecasts:
How big are the waves at Porthtowan today (18 Aug):
- Afternoon surf: Afternoon surf (18 Aug, local time) - 4.5ft (1.4m), 6s period with W swell.
- Evening surf: Evening surf (18 Aug, local time) - 4.5ft (1.3m), 7s period with W swell.
The current surf forecast for Porthtowan at 9PM is: 1.3m 7s primary swell from a West direction and 0.2m 17s secondary swell from a South-southwest direction (forecast issued at 06:00pm August 18). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Aug) | - | - |
| Afternoon (18 Aug) | 4.5ft (1.4m) | 6s |
| Evening (18 Aug) | 4.5ft (1.3m) | 7s |
Table - waves today at Porthtowan. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Very mild (max 19°C on Tue afternoon, min 14°C on Thu night). Winds decreasing (fresh winds from the W on Wed afternoon, light winds from the NE by Thu night). | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | |||||||||||||||||
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 6 | W 7 | W 7 | W 7 | WNW 7 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | W 6 | W 7 | W 8 | W 9 | W 9 | WNW 9 | WNW 9 | WNW 9 | W 10 | W 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 161 | 148 | 152 | 161 | 171 | 276 | 254 | 265 | 363 | 213 | 376 | 501 | 715 | 846 | 880 | 790 | 653 | 589 | 470 |
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 | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on |
High Tide | 9:48PM5.59m | 10:08AM5.28m | 10:29PM5.07m | 10:52AM4.83m | |||||||||||||||
Low Tide | 3:44PM0.99m | 4:05AM1.23m | 4:23PM1.44m | 4:45AM1.69m | 5:10PM1.88m | ||||||||||||||
 | |  | |  |  |  | | | |  | |  | |  | | | | | |
 | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:16 | — | — | — | — | — | — |
 | — | 8:35 | — | — | — | — | — | — | — | 8:32 | — | — | — | — | — | — | — | 8:30 | — |
mm | — | — | — | — | 1 | 1 | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 19 | 18 | 18 | 17 | 16 | 17 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 17 | 17 | 17 | 18 | 17 | 15 |
Feels °C | 15 | 15 | 16 | 15 | 14 | 15 | 15 | 13 | 12 | 14 | 13 | 13 | 11 | 12 | 12 | 12 | 14 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 17 | SSW 17 | SSW 17 | SSW 17 | WNW 9 | WNW 9 | SSW 16 | SSW 16 | SW 16 | SW 16 | SW 15 | SSW 15 | SSW 15 | SSW 14 | WNW 9 | WNW 9 | W 10 | W 10 |
| kJ | 11 | 12 | 29 | 29 | 28 | 276 | 254 | 24 | 24 | 39 | 38 | 36 | 21 | 21 | 21 | 790 | 653 | 589 | 470 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | SSW 17 | SSW 16 | SSW 16 | — | — | — | — | — | — | — | — | SW 14 | SW 14 | SW 14 | N 5 |
| kJ | — | — | — | — | 27 | 26 | 24 | — | — | — | — | — | — | — | — | 33 | 33 | 33 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SW 14 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 32 |
Wind waves Height (m) Direction Period (s) | W 6 | W 7 | W 7 | W 7 | WNW 7 | — | — | WNW 9 | WNW 10 | W 6 | W 7 | W 8 | W 9 | W 9 | WNW 9 | — | — | N 5 | N 5 |
| kJ | 161 | 148 | 152 | 161 | 171 | — | — | 265 | 363 | 213 | 376 | 501 | 715 | 846 | 880 | — | — | 7 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 281 | 288 | 392 | 218 | 210 | 157 | 19 | 19 | 210 | 218 | 218 | 218 | 243 | 210 | 159 | 150 | 159 | 150 | 150 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||
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