Surf Forecasts:
Port Isaac surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 7AM (local time) - 1.5ft (0.5m), 11s period, W swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 1PM (local time) - 5.5ft (1.7m), 9s period, W swell with 463 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 7AM (local time) - 1.5ft (0.5m), 11s period with W swell.
Best Forecast Surf Conditions for Port Isaac this week:
The surf forecast for Port Isaac over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 25) at 7AM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.6m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Port Isaac in the next 16 days are 1.7m 9s and forecast to arrive on Thursday (Aug 20) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 25th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 7AM (Tue 25th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 1PM (Thu 20th Aug) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you. The surf for the near future is mostly a no-go. We're looking at a long stretch of junky, wind-blown conditions before things finally clean up.
The next week and a half is pretty grim. Onshore and cross-shore winds are messing up what little swell we have. The energy is weak, often in the double or even single digits, leaving the waves small and messy. It's the kind of stuff that’ll have you checking the tide charts just to see if there's any kind of bank.
The one real standout doesn’t show up until Tuesday, September 1st. Things finally click. The morning has a solid 2.2m swell with a cross-offshore wind, but the afternoon is the winner. The wind swings offshore, it’s glassy clean, and the swell is still a meaty 2.1m. The combined energy hits 847, which is a big number. The swell direction is W, which is exactly what Port Isaac likes. This is the one to plan for. It’s going to be powerful and clean, a proper session.
Before that, on Sunday the 30th, there’s a slight tease. The morning has a 1.6m swell with a light cross-offshore breeze. It’s clean and the energy is moderate at 266. It’s surfable, but nothing to write home about. More of a warm-up for the big day on Tuesday.
Water temp is about average for this time of year, so nothing out of the ordinary there.
So, be patient, save your energy for the flat, crappy days. There's a gem waiting on the 1st of September. That’s your window.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Tue night. Very mild (max 19°C on Mon night, min 16°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 19°C on Sat morning, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 6 | W 6 | W 6 | W 6 | W 6 | W 7 | W 7 | W 9 | W 9 | W 8 | W 8 | W 9 | W 10 | W 9 | W 9 | N 4 | W 9 | NNW 4 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 147 | 115 | 143 | 81 | 161 | 315 | 285 | 363 | 160 | 66 | 46 | 36 | 29 | 25 | 16 | 18 | 14 | 8 | 12 | 12 | 5 |
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 | cross | cross-on | cross-on | on | cross-on | on | cross-on | cross-off | cross-on | cross-on | cross-on | on | cross-on | glassy | cross-on | off |
High Tide | 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 | 3:05PM4.71m | 3:44AM4.77m | 4:12PM5.10m | ||||||||
Low Tide | 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 | 8:50AM2.57m | 9:36PM2.38m | 10:04AM2.24m | 10:36PM1.98m | ||||||||
 | |  | |  | | | |  | | | | | |  | | | | | | | |
 | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — |
 | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — |
mm | — | — | 2 | — | — | 3 | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 19 | 17 | 18 | 18 | 16 | 18 | 18 | 15 | 17 | 17 | 16 | 19 | 17 | 16 | 16 | 16 | 15 | 17 | 17 | 16 |
Feels °C | 17 | 16 | 14 | 15 | 13 | 12 | 13 | 14 | 12 | 13 | 13 | 12 | 16 | 13 | 12 | 12 | 12 | 12 | 15 | 14 | 11 |
Swell 1 Height (m) Direction Period (s) | W 17 | W 17 | W 17 | W 9 | W 16 | W 9 | W 9 | W 9 | W 9 | W 8 | W 8 | NNW 4 | W 10 | W 9 | W 9 | W 9 | W 9 | NNW 4 | W 8 | W 8 | W 3 |
| kJ | 6 | 6 | 6 | 39 | 5 | 28 | 136 | 363 | 160 | 66 | 46 | 11 | 29 | 25 | 14 | 14 | 14 | 4 | 12 | 12 | 2 |
Swell 2 Height (m) Direction Period (s) | — | — | — | W 16 | — | SW 16 | W 15 | SW 14 | SW 14 | N 4 | W 16 | W 9 | NNW 4 | SW 15 | SW 15 | SW 14 | SW 14 | W 8 | NNW 3 | W 14 | W 8 |
| kJ | — | — | — | 5 | — | 10 | 4 | 8 | 8 | 9 | 5 | 36 | 4 | 9 | 8 | 8 | 8 | 6 | 1 | 4 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | W 16 | W 13 | W 16 | SW 15 | — | — | — | — | SW 14 | W 14 | — | W 12 |
| kJ | — | — | — | — | — | — | — | — | — | 5 | 3 | 5 | 9 | — | — | — | — | 8 | 4 | — | 3 |
Wind waves Height (m) Direction Period (s) | WNW 6 | W 6 | W 6 | W 6 | W 6 | W 7 | W 7 | — | NNW 5 | — | NNW 4 | — | ENE 3 | N 5 | NNW 4 | N 4 | NNW 4 | — | — | — | — |
| kJ | 147 | 115 | 143 | 81 | 161 | 315 | 285 | — | 39 | — | 6 | — | 1 | 14 | 16 | 18 | 5 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 249 | 227 | 120 | 250 | 227 | 249 | 113 | 221 | 69 | 8 | 69 | 35 | 6 | 67 | 288 | 288 | 85 | 233 | 408 | 487 | 218 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Port Isaac surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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