Surf Forecasts:
Port Isaac surf forecast from 5 Aug 2026:
- Most powerful swell: Wednesday 5 Aug, 10AM (local time) - 5.5ft (1.7m), 7s period, W swell with 290 kJ wave energy.
Best Forecast Surf Conditions for Port Isaac this week:
The most powerful waves expected at Port Isaac in the next 16 days are 1.7m 7s and forecast to arrive on Wednesday (Aug 05) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Aug 12) at 4AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Wed 5th Aug) | 5.5ft (1.7m) 7s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright, listen up. I’ve stared at the charts for the next couple of weeks and, man, it’s a tough sell. The surf for Port Isaac is looking mostly flat and messy for a long stretch, so you might want to find something else to do.
We’re talking about a solid week and a half to two weeks of poor surf. The waves are small, mostly under 3 feet, and the energy is weak – we’re seeing combined energy readings in the 20s and 30s. On top of that, the wind is just constantly cross-onshore, chopping everything up. It’s the kind of surf that’s only good for a quick look before you head for a coffee.
There is one day with some size, around the 18th, where the swell pushes up to 8 feet. But the energy readings blow up to 817 and 1198, which is just a ton of power. But, the wind is onshore for that whole day, so it’s going to be a wild, blown-out mess. That’s not a surfer’s wave; that’s a kite surfer’s dream. For anyone else, it’s a day to stay on the beach.
Now, for the one glimmer of hope. It’s a long way out, but on Tuesday, August 20th, the stars might just align. The wind is forecast to go light offshore from the south, which will clean things right up. The swell is a manageable 4 feet from the west with a 9-second period, and the energy is moderate at 215. It’s not going to be perfect, but it’ll be the only clean, rideable surf in the whole 16-day window. The quality is still just average, but with that offshore wind, Port Isaac is the go-to. It’s a fairly consistent break, but it can get crowded. But just remember, this is a long-range call, so don't bank on it. The water temp is normal for the season, so that’s one less thing to worry about.
So, there you have it. A whole lot of nothing, with one potential diamond in the rough at the very end. Keep your fingers crossed.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Tue night, min 14°C on Thu night). Winds decreasing (fresh winds from the WNW on Tue night, calm by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Sat afternoon, min 15°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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) | W 7 | WNW 7 | WNW 6 | WNW 6 | W 6 | W 10 | W 9 | W 9 | W 9 | W 9 | W 8 | W 8 | WNW 6 | WNW 5 | W 5 | WNW 6 | W 6 | W 8 | WNW 7 | WNW 7 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 290 | 180 | 115 | 100 | 31 | 17 | 15 | 7 | 6 | 14 | 33 | 45 | 31 | 23 | 14 | 43 | 24 | 30 | 18 | 10 | 7 |
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 | cross-on | cross | cross-on | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on | on | on | cross-on | glassy | on | cross |
High Tide | 10:29AM6.03m | 10:52PM6.02m | 11:20AM5.72m | 11:50PM5.66m | 12:25PM5.44m | 1:03AM5.38m | 1:46PM5.33m | 2:30AM5.36m | 3:10PM5.54m | 3:49AM5.65m | 4:21PM6.00m | 4:53AM6.09m | 5:19PM6.54m | ||||||||
Low Tide | 4:19AM1.05m | 4:37PM1.23m | 5:06AM1.36m | 5:31PM1.55m | 6:07AM1.68m | 6:43PM1.81m | 7:27AM1.89m | 8:14PM1.86m | 8:57AM1.80m | 9:41PM1.57m | 10:14AM1.44m | 10:50PM1.09m | 11:14AM0.96m | 11:45PM0.59m | |||||||
 |  |  | | | | | |  | | | | | | | | | | | | | |
 | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:58 | — | — | 6:00 | — | — |
 | — | 8:58 | — | — | 8:55 | — | — | 8:53 | — | — | 8:52 | — | — | 8:51 | — | — | 8:49 | — | — | 8:46 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 17 | 16 | 16 | 16 | 15 | 18 | 18 | 15 | 20 | 21 | 17 | 19 | 19 | 17 | 19 | 19 | 16 | 22 | 22 | 20 |
Feels °C | 13 | 12 | 12 | 12 | 12 | 13 | 16 | 16 | 14 | 18 | 19 | 17 | 19 | 17 | 16 | 17 | 17 | 15 | 20 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | — | W 13 | W 11 | W 10 | W 6 | W 5 | WNW 5 | W 9 | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | WNW 8 | WNW 6 | W 6 | W 8 | WNW 7 | WNW 7 | W 7 |
| kJ | — | 3 | 9 | 8 | 31 | 13 | 5 | 7 | 6 | 14 | 33 | 45 | 6 | 6 | 14 | 43 | 24 | 30 | 18 | 10 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 10 | W 10 | W 9 | — | W 4 | — | — | — | — | — | WSW 6 | — | W 8 | SW 7 | W 10 | W 9 | W 9 |
| kJ | — | — | — | — | 17 | 17 | 15 | — | 1 | — | — | — | — | — | 4 | — | 11 | 2 | 8 | 7 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 12 | NNW 4 | — | — | W 5 | — | — | — | — | — | N 4 | — | W 11 | W 10 | SW 6 | W 6 | W 12 |
| kJ | — | — | — | — | 3 | 4 | — | — | 1 | — | — | — | — | — | 1 | — | 2 | 2 | 2 | 1 | 3 |
Wind waves Height (m) Direction Period (s) | W 7 | WNW 7 | WNW 6 | WNW 6 | NNW 5 | — | — | WNW 4 | — | — | — | — | WNW 6 | WNW 5 | W 5 | — | NNW 4 | — | — | — | SE 2 |
| kJ | 290 | 180 | 115 | 100 | 7 | — | — | 4 | — | — | — | — | 31 | 23 | 11 | — | 1 | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 250 | 227 | 288 | 487 | 309 | 407 | 398 | 398 | 267 | 83 | 228 | 85 | 85 | 249 | 69 | 69 | 69 | 67 | 396 | 69 | 69 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Port Isaac Surf forecast
The above surf forecast table for Port Isaac provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Port Isaac can be found by selecting the local surf guide option on the grey menu. Our Port Isaac 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 (Port Isaac) 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 Port Isaac 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.
Are you planning a holiday in North Cornwall? If you are looking for accommodation near Port Isaac, camping, hotels and holiday cottages in North Cornwall, consider staying in Padstow which is 8 km (5 miles) away. Other places in and around North Cornwall where you can find information about places to rent, and car hire include Bodmin which is 15 km (9 miles) away, Newquay, Par and Saint Austell.
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