Surf Forecasts:
How big are the waves at Porthtowan today (17 Aug):
- Morning surf: Morning surf (17 Aug, local time) - 3ft (0.9m), 6s period with WNW swell.
- Afternoon surf: Afternoon surf (17 Aug, local time) - 3.5ft (1.0m), 8s period with WNW swell.
- Evening surf: Evening surf (17 Aug, local time) - 3.5ft (1.0m), 7s period with W swell.
The current surf forecast for Porthtowan at 4AM is: 0.7m 5s primary swell from a West-northwest direction and 0.3m 7s secondary swell from a West direction, 0.2m 10s secondary swell from a West-northwest direction (forecast issued at 12:00am August 17). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Aug) | 3ft (0.9m) | 6s |
| Afternoon (17 Aug) | 3.5ft (1.0m) | 8s |
| Evening (17 Aug) | 3.5ft (1.0m) | 7s |
Table - waves today at Porthtowan. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Tue night. Very mild (max 19°C on Sun night, min 16°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||||||||||
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) | W 7 | WNW 5 | WNW 6 | WNW 6 | WNW 8 | W 8 | W 7 | W 7 | W 5 | W 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 6 | WNW 6 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | W 7 | W 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 12 | 23 | 55 | 64 | 133 | 115 | 109 | 97 | 62 | 98 | 160 | 134 | 155 | 139 | 139 | 165 | 212 | 254 | 270 | 261 | 293 | 373 | 358 | 537 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:51AM6.09m | 9:09PM6.08m | 9:28AM5.72m | 9:48PM5.59m | 10:08AM5.28m | |||||||||||||||||||
Low Tide | 2:54AM0.38m | 3:07PM0.57m | 3:29AM0.78m | 3:44PM0.99m | 4:05AM1.23m | 4:23PM1.44m | ||||||||||||||||||
 |  |  |  |  | | | | | | | | | | | |  | |  | | | | |  | |
 | — | 6:11 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — | — | 6:13 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 8:37 | — | — | — | — | — | — | — | 8:35 | — | — | — | — | — | — | — | 8:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 1 |
Temp °C | 17 | 18 | 19 | 19 | 19 | 19 | 18 | 16 | 17 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 17 | 16 | 16 | 18 | 18 | 18 | 17 | 17 |
Feels °C | 16 | 17 | 18 | 17 | 17 | 17 | 15 | 14 | 15 | 17 | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 13 | 13 | 13 | 12 | 11 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | WNW 9 | WNW 9 | SW 18 | SW 18 | SW 18 | N 4 | — | SW 16 | SW 16 | SSW 17 | SSW 17 | SW 17 | SW 17 | SSW 17 | SSW 17 | SSW 17 | SSW 16 | WNW 11 | SSW 16 | SSW 16 | WNW 10 | SW 16 |
| kJ | 8 | 8 | 17 | 43 | 12 | 12 | 12 | 1 | — | 10 | 11 | 28 | 28 | 11 | 12 | 29 | 29 | 28 | 26 | 25 | 24 | 24 | 72 | 38 |
Swell 2 Height (m) Direction Period (s) | — | WNW 10 | SW 18 | SW 18 | — | — | — | SW 17 | SW 16 | — | — | W 8 | — | — | — | — | — | — | SSW 16 | SSW 16 | — | — | SW 16 | — |
| kJ | — | 10 | 12 | 12 | — | — | — | 11 | 10 | — | — | 4 | — | — | — | — | — | — | 26 | 24 | — | — | 39 | — |
Swell 3 Height (m) Direction Period (s) | SW 18 | SW 18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 12 | 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | W 4 | WNW 5 | WNW 6 | WNW 6 | WNW 8 | W 8 | W 7 | W 7 | W 5 | W 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | W 6 | WNW 6 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | W 7 | W 8 |
| kJ | 8 | 23 | 55 | 64 | 133 | 115 | 109 | 97 | 62 | 98 | 160 | 134 | 155 | 139 | 139 | 165 | 212 | 254 | 270 | 261 | 293 | 373 | 358 | 537 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 249 | 273 | 280 | 280 | 401 | 513 | 584 | 210 | 258 | 249 | 150 | 281 | 392 | 889 | 505 | 210 | 210 | 159 | 104 | 227 | 227 | 553 | 286 | 210 |
Best forecast wave conditions in North Cornwall | ||||||||||||||||||||||||
Best forecast wave conditions in United Kingdom | ||||||||||||||||||||||||
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