
Surf Forecasts:
Porthtowan surf forecast from 8 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 7AM (local time) - 4ft (1.2m), 11s period, W swell with 338 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period with W swell.
Best Forecast Surf Conditions for Porthtowan this week:
The surf forecast for Porthtowan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 10PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.3m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Porthtowan in the next 16 days are 1.2m 11s and forecast to arrive on Thursday (Aug 13) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 12) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 11th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 10PM (Tue 11th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 7AM (Thu 13th Aug) | 4ft (1.2m) 11s |
Table - best surf conditions forecast for Porthtowan over the next 16 days.
The Lowdown
Alright, Rusty here, let's talk about what's coming up for Porthtowan.
Honestly, things are looking pretty flat and quiet for a long stretch. The first solid window of surfable waves doesn't roll in until the morning of the 12th of August, so there's a bit of a gap there. Before that, we're looking at tiny, poor surf conditions with no real energy to speak of.
Come the morning of the 12th, things finally start to pick up a touch. We're looking at a small 1.0ft swell from the west, with a period of 10 seconds. The wind is blowing offshore from the ESE at 16 mph, which should keep it pretty clean. The combined energy of the swell is moderate at 160, so there's a bit of push there. This is a good, small-wave option for the beginners, as Porthtowan is rated for that difficulty. The water temp is sitting at 65°, which is a touch warmer than normal for this time of year.
The afternoon of the 12th holds similar 1.0ft west swell, but with a slightly shorter period of 9 seconds. The wind stays offshore from the SE at 16 mph, so it'll still be clean. The swell energy drops a bit to 136, but it's still surfable. These few days around the 12th are the best on offer, but it's nothing to write home about.
The rest of the outlook through to the 23rd of August is a mixed bag of onshore winds, cross-shore chop, and generally poor conditions. The swell does get bigger, especially on the 22nd with a 8ft west swell, but the wind is howling at 25 mph from the WNW, making it a total mess. That's more of a kite-surfing day than a paddle-surfing day. The 23rd sees a 10ft swell from the NW, but again, the wind is onshore and the period is short at 8 seconds, so it's not going to be any good for a clean wave.
So, the only real window to get out is the 12th of August. It's small, it's clean, and it's the best we've got. Keep your expectations low, but you might snag a few fun ones.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Sat morning, min 17°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Wed afternoon, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | WNW 9 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | W 8 | WNW 8 | W 13 | W 11 | W 10 | W 9 | W 9 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 |
Wave Graph | |||||||||||||||||||||
17 | 31 | 28 | 26 | 25 | 31 | 24 | 22 | 33 | 20 | 12 | 84 | 158 | 136 | 173 | 319 | 282 | 184 | 126 | 89 | 63 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | glassy | on | on | on | cross-on | cross-on | cross | off | off | off | off | off | cross-off | on | on | on | cross-on | cross-on | cross-on |
High Tide | 1:26PM4.93m | 2:09AM4.95m | 2:49PM5.12m | 3:28AM5.21m | 4:00PM5.54m | 4:32AM5.62m | 4:57PM6.03m | 5:25AM6.02m | 5:47PM6.47m | 6:11AM6.33m | 6:31PM6.76m | 6:54AM6.50m | 7:13PM6.86m | ||||||||
Low Tide | 7:59PM1.68m | 8:42AM1.63m | 9:25PM1.41m | 9:58AM1.29m | 10:34PM0.96m | 10:59AM0.85m | 11:30PM0.50m | 11:49AM0.44m | 00:17AM0.14m | 12:34PM0.15m | 1:00AM-0.06m | 1:15PM0.01m | 1:40AM-0.08m | ||||||||
5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | |
— | 8:52 | — | — | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:43 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 18 | 21 | 21 | 18 | 19 | 18 | 19 | 23 | 22 | 20 | 24 | 25 | 21 | 21 | 20 | 19 | 21 | 20 | 19 |
Feels °C | 19 | 19 | 19 | 19 | 19 | 17 | 17 | 15 | 16 | 19 | 17 | 16 | 18 | 20 | 20 | 19 | 18 | 19 | 21 | 18 | 21 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 5 | WNW 8 | W 8 | WNW 8 | WNW 7 | W 11 | W 10 | W 9 | W 9 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 |
17 | 31 | 28 | 26 | 25 | 31 | 17 | 22 | 33 | 20 | 11 | 84 | 158 | 136 | 173 | 319 | 282 | 184 | 126 | 89 | 63 | |
Swell 2 Height (m) Direction Period (s) | SW 7 | WSW 6 | SSE 4 | WSW 6 | WSW 6 | SW 7 | SW 6 | SW 7 | SW 7 | N 4 | W 9 | WNW 7 | SW 6 | — | W 12 | E 5 | E 5 | E 5 | S 13 | S 13 | SW 13 |
2 | 4 | 1 | 4 | 4 | 16 | 14 | 15 | 7 | 1 | 7 | 5 | 1 | — | 76 | 14 | 8 | 2 | 3 | 3 | 7 | |
Swell 3 Height (m) Direction Period (s) | W 5 | SW 11 | WSW 7 | SW 12 | SW 12 | SW 12 | WNW 8 | W 11 | W 11 | SW 6 | W 13 | SW 6 | SW 6 | — | SSE 4 | — | S 11 | S 11 | S 13 | — | S 10 |
1 | 5 | 4 | 6 | 6 | 6 | 24 | 2 | 2 | 6 | 12 | 1 | 1 | — | 1 | — | 2 | 2 | 3 | — | 2 | |
Wind waves Height (m) Direction Period (s) | SE 3 | SE 4 | — | — | — | NW 3 | — | NW 5 | N 4 | SE 2 | SE 4 | ESE 6 | ESE 4 | SE 4 | — | — | NW 3 | WNW 3 | — | — | — |
1 | 4 | — | — | — | 2 | — | 14 | 8 | 1 | 13 | 23 | 18 | 11 | — | — | 2 | 2 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 193 | 22 | 22 | 401 | 218 | 40 | 22 | 219 | 22 | 387 | 219 | 0 | 0 | 0 | 0 | 20 | 40 | 17 | 17 | 210 | 18 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Porthtowan Surf forecast
The above surf forecast table for Porthtowan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Porthtowan can be found by selecting the local surf guide option on the grey menu. Our Porthtowan surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Porthtowan) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Porthtowan may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Porthtowan is 8 km (5 miles) from Camborne. If you plan a holiday in North Cornwall, look for hotels and other accommodation in Camborne. Camborne has rooms for a wide range of budgets as well as car hire and transport links.











