
Surf Forecasts:
Porthtowan surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period, W swell with offshore winds.
- Most powerful swell: Thursday 13 Aug, 7AM (local time) - 4ft (1.2m), 11s period, W swell with 332 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 7s. The wind is predicted to be 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 5s period and expected on Wednesday (Aug 12) at 1PM.
| 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
G'day, I'm Rusty. Let's have a look at what's on the cards for Porthtowan over the next couple of weeks.
Alright, first up, I gotta be straight with you – the next week and a bit is pretty grim. We're looking at a solid stretch of nothing much from the 10th right through to the 21st of August. There's hardly a wave worth paddling for, and the conditions are just messy. The wind is mostly cross-on or onshore, which is a recipe for chop and poor surf. The water temp is sitting at 66°, which is a touch warmer than normal for this time of year, but that's about the only nice thing I can say.
The first real glimmer of hope comes Wednesday morning, the 18th of August. It's still small, with a 3ft swell from the west, but the wind is a clean offshore from the ESE. The combined energy is weak (111), but at least it's clean. You'll be scratching around for little waves, but it's surfable. Then it goes quiet again.
Now, hold onto your board, because Saturday the 22nd of August is a monster. The swell is predicted to be huge – 13ft from the WNW with a period of 11 seconds. The combined energy is massive (3583). But here's the catch: the wind is a moderate cross-on breeze from the north, and the forecast actually says it's predicted to be too big for this break. This is expert-only territory, and even then, it's going to be a washing machine. The break is a beach setup, so with that much energy and cross-on wind, it’s probably more interesting for the kite surfers than paddle surfers.
The real standout, though, is Monday the 24th of August. Mark it in your calendar. We've got a really nice looking morning. The swell is a clean 3ft from the west, but the period is a very long 14 seconds – that's proper groundswell energy. The combined energy is moderate (492), and the wind is glassy – a light offshore from the SE. For a beach break, that long period might make the waves a bit straight, but with glassy conditions, it's going to be clean and have some punch. The crowd profile says "often," so don't expect to have it to yourself, but if you can get out there, it’s the best on offer by a long shot. After that, Tuesday the 25th has a 3ft west swell with an offshore ESE wind, but the energy drops off (204) and it's not as special.
So, to sum it up: the first week and a half is a write-off, then we get a massive, messy swell that's too big. The clear winner is the 24th of August morning – glassy, long-period groundswell, and clean conditions. Get on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 16°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Thu night, min 15°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 8 | W 13 | W 11 | W 10 | W 9 | W 10 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 | W 8 | WNW 8 | W 8 | WNW 7 | W 7 | N 4 | N 5 | WNW 9 | W 8 |
Wave Graph | |||||||||||||||||||||
19 | 12 | 85 | 125 | 139 | 184 | 319 | 284 | 220 | 126 | 205 | 136 | 124 | 96 | 55 | 17 | 16 | 12 | 21 | 28 | 63 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross | cross-on | cross-on | on | on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-off |
High Tide | 4:32AM5.62m | 4:57PM6.03m | 5:25AM6.02m | 5:47PM6.47m | 6:11AM6.33m | 6:31PM6.76m | 6:54AM6.50m | 7:13PM6.86m | 7:34AM6.51m | 7:53PM6.76m | 8:13AM6.37m | 8:31PM6.49m | 8:51AM6.09m | 9:09PM6.08m | |||||||
Low Tide | 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 | 1:54PM0.05m | 2:18AM0.07m | 2:31PM0.25m | 2:54AM0.38m | 3:07PM0.57m | 3:29AM0.78m | |||||||
6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | |
— | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 20 | 25 | 26 | 20 | 21 | 22 | 19 | 19 | 18 | 17 | 18 | 17 | 16 | 17 | 17 | 15 | 20 | 21 | 19 |
Feels °C | 20 | 20 | 18 | 23 | 24 | 19 | 20 | 22 | 19 | 18 | 15 | 15 | 15 | 13 | 13 | 13 | 12 | 9 | 14 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 7 | W 11 | W 10 | W 9 | W 10 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 | W 8 | WNW 8 | W 8 | WNW 7 | W 7 | W 7 | W 7 | N 4 | W 8 |
19 | 11 | 85 | 125 | 139 | 184 | 319 | 284 | 220 | 126 | 205 | 136 | 124 | 96 | 55 | 17 | 16 | 9 | 8 | 10 | 63 | |
Swell 2 Height (m) Direction Period (s) | SW 6 | W 9 | WNW 7 | ESE 5 | ESE 5 | E 5 | ENE 5 | E 6 | E 5 | S 13 | S 13 | N 4 | — | — | SW 12 | WSW 8 | WNW 5 | W 7 | W 10 | WNW 9 | N 4 |
6 | 7 | 10 | 2 | 3 | 8 | 9 | 6 | 2 | 3 | 3 | 6 | — | — | 6 | 11 | 5 | 1 | 2 | 28 | 3 | |
Swell 3 Height (m) Direction Period (s) | N 4 | W 13 | SW 6 | SW 6 | — | — | — | S 11 | S 11 | — | — | SW 13 | — | — | S 20 | N 4 | SW 18 | SW 18 | SW 18 | W 7 | SE 5 |
1 | 12 | 1 | 1 | — | — | — | 2 | 2 | — | — | 7 | — | — | 7 | 2 | 13 | 12 | 12 | 4 | 1 | |
Wind waves Height (m) Direction Period (s) | SE 2 | SE 3 | SE 5 | E 5 | — | — | NNW 2 | — | — | WNW 5 | — | NNW 4 | N 5 | N 5 | N 4 | NNE 4 | N 4 | N 4 | N 5 | — | — |
1 | 3 | 6 | 17 | — | — | 1 | — | — | 51 | — | 6 | 31 | 16 | 12 | 4 | 2 | 10 | 21 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 387 | 219 | 0 | 10 | 22 | 20 | 20 | 210 | 17 | 34 | 23 | 23 | 83 | 23 | 257 | 393 | 262 | 385 | 343 | 22 | 0 |
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.











