Surf Forecasts:
Port Isaac surf forecast from 16 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 6ft (1.9m), 8s period, WNW swell with 427 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 1.9m 8s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Saturday (Aug 22) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 20th Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright, let’s switch over to feet and Fahrenheit for you imperial crew.
Right off the bat, we’ve got a long, flat, and frustrating stretch ahead. From now, Sunday the 16th, all the way through to the morning of Friday the 28th of August, there is literally nothing worth paddling out for. The combined swell energy is struggling, barely getting into triple digits on a few days, but the wind is a mess – mostly cross-onshore, gusty, and lumpy – keeping everything blown out and poor. You won’t see me recommending anything with a straight face for over a week and a half. It’s one of those blanks.
Then, on the morning of Friday the 28th, things finally wake up. That morning brings a proper window of clean surf. We’ve got about 7ft of WNW groundswell rolling in with a solid 10 second period. The combined energy jumps to 799 (moderate-to-strong). The wind is light and cross-off from the south, making for clean conditions. This is the standout of the whole run. For beginners though, that 7ft is getting big, pushy, and a little intimidating – this is more for the lads who know their way around. Crowds are sometimes a thing at Port Isaac (Cornwall), so expect a few others with the same idea.
That afternoon on the 28th, the wind swings cross-shore and the swell drops a touch to about 5ft, cutting the energy back to 318. It’s marginal and the tide might mess with it a bit.
Saturday the 29th has a clean, offshore morning with about 3ft west swell and 8 seconds, combined energy of 137. It’s surfable, and the moderate offshore wind will keep it tidy, but it’s ordinary and small. Nothing compared to Friday morning.
Honestly, if you’ve got a window, save your energy for that Friday morning on the 28th. That’s the one bright spot in an otherwise quiet forecast.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Mon morning, min 15°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Tue night. Very mild (max 18°C on Wed afternoon, min 15°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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 | W 7 | W 7 | WNW 5 | WNW 8 | W 7 | WNW 7 | WNW 6 | W 6 | WNW 6 | WNW 6 | WNW 8 | WNW 7 | WNW 7 | W 8 | W 9 | W 9 | W 8 | W 11 | NNE 6 | NNW 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 16 | 9 | 20 | 85 | 81 | 181 | 98 | 79 | 119 | 150 | 427 | 259 | 144 | 116 | 52 | 55 | 22 | 20 | 25 | 26 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross |
High Tide | 8:34AM6.93m | 8:52PM7.05m | 9:11AM6.63m | 9:30PM6.61m | 9:48AM6.22m | 10:08PM6.08m | 10:27AM5.75m | 10:49PM5.52m | 11:11AM5.27m | 11:38PM5.00m | 12:09PM4.84m | 00:48AM4.62m | 1:32PM4.60m | 2:23AM4.52m | |||||||
Low Tide | 2:46PM0.28m | 3:08AM0.42m | 3:22PM0.62m | 3:43AM0.85m | 3:58PM1.07m | 4:19AM1.34m | 4:37PM1.56m | 4:59AM1.84m | 5:24PM2.04m | 5:51AM2.29m | 6:30PM2.44m | 7:10AM2.59m | 8:06PM2.59m | ||||||||
 | |  |  | | | | |  |  | | | |  |  |  | |  | |  | | |
 | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — |
 | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — |
mm | — | — | — | — | — | — | — | — | 4 | 1 | — | 1 | — | — | — | 1 | — | — | 1 | 3 | — |
Temp °C | 17 | 18 | 19 | 20 | 19 | 19 | 19 | 18 | 17 | 17 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 17 | 17 | 13 |
Feels °C | 14 | 16 | 19 | 19 | 18 | 17 | 17 | 15 | 14 | 13 | 13 | 12 | 13 | 13 | 14 | 12 | 12 | 11 | 14 | 12 | 8 |
Swell 1 Height (m) Direction Period (s) | W 7 | W 7 | W 7 | WNW 5 | WNW 8 | — | W 17 | W 17 | W 17 | W 16 | W 16 | W 16 | WNW 7 | W 9 | W 8 | W 9 | W 9 | W 8 | W 8 | W 8 | NNW 5 |
| kJ | 17 | 16 | 9 | 20 | 85 | — | 6 | 6 | 6 | 5 | 5 | 5 | 259 | 74 | 116 | 52 | 55 | 22 | 12 | 12 | 26 |
Swell 2 Height (m) Direction Period (s) | — | — | W 18 | WNW 9 | W 18 | — | — | — | — | — | — | — | W 15 | SW 14 | NNW 5 | W 13 | W 16 | W 12 | W 11 | W 10 | W 10 |
| kJ | — | — | 6 | 16 | 6 | — | — | — | — | — | — | — | 4 | 8 | 7 | 3 | 5 | 11 | 20 | 17 | 17 |
Swell 3 Height (m) Direction Period (s) | — | — | — | W 7 | — | — | — | — | — | — | — | — | — | — | W 14 | W 16 | W 13 | W 16 | NNW 4 | SW 15 | SW 15 |
| kJ | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 3 | 5 | 1 | 9 | 8 |
Wind waves Height (m) Direction Period (s) | NNW 4 | NW 3 | NW 3 | — | — | W 7 | WNW 7 | WNW 6 | W 6 | WNW 6 | WNW 6 | WNW 8 | — | WNW 7 | — | N 4 | NNW 4 | NNW 4 | ENE 3 | NNE 6 | ENE 3 |
| kJ | 6 | 3 | 3 | — | — | 81 | 181 | 98 | 79 | 119 | 150 | 427 | — | 144 | — | 11 | 12 | 6 | 1 | 25 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 240 | 329 | 235 | 288 | 227 | 309 | 288 | 227 | 227 | 250 | 291 | 250 | 250 | 221 | 61 | 69 | 69 | 69 | 85 | 40 | 118 |
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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