Surf Forecasts:
Port Isaac surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 4AM (local time) - 4.5ft (1.3m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 7AM (local time) - 6ft (1.8m), 10s period, W swell with 653 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 4AM (local time) - 4.5ft (1.3m), 10s 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 Sunday (Sep 20) at 4AM. The primary swell is predicted to be 1.3m and 10s period with a secondary swell of 0.1m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Port Isaac in the next 16 days are 1.8m 10s and forecast to arrive on Wednesday (Sep 16) at 7AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 20th Sep) | 4.5ft (1.3m) 10s |
| Best Surf | 4AM (Sun 20th Sep) | 4.5ft (1.3m) 10s |
| Most Powerful | 7AM (Wed 16th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s lined up for Port Isaac over the next couple of weeks.
Honestly, the forecast is a bit of a grind for the first week or so. We’re looking at a long stretch of onshore winds and messy conditions that just won’t clean up properly. The combined swell energy is mostly moderate (between 160 and 454), which tells you there’s power in the water, but it’s all getting torn apart. From Monday the 14th right through to Saturday the 26th, it’s a real battle. The wind stays cross-onshore or cross-off and never really locks in clean, with speeds pushing 15 to 19 mph most days. The swell stays between 2 ft and 7 ft, but the period is short — mostly 7 to 10 seconds — so the waves are lumpy, crumbly, and just not worth paddling out for. There’s a tiny glimmer on Monday the 21st morning with a clean, cross-off breeze but only 2 ft of swell at a long 13-second period (combined energy 166), but it’s very ordinary and barely surfable. After that, it dries up again.
But hang in there… because Sunday the 27th is the real payoff. That morning, we get a clean offshore wind from the Southeast at 12 mph, glassing up a solid 8 ft of west swell with a 10-second period. The combined energy rockets to 1535 — that’s very strong energy. The afternoon holds the same: 8 ft, clean offshore, period bumping up to 11 seconds, energy reading 1555. This is excellent, but only for experienced surfers — it’s too big for beginners. The water temperature is about average for this time of year, no major anomaly, so a spring suit will be fine. A spot like Port Isaac (North Cornwall) can get busy when it’s good, and with crowds marked as “sometimes”, expect a few others with the same idea. That Sunday is the standout, no question.
Monday the 28th morning drops a little but stays clean with glassy conditions and 7 ft of west-northwest swell, though the period drops to 6 seconds, making it a bit fat and quick to close out. Still a fun day for the experienced crew, but not a patch on the Sunday.
After that, the forecast trails off into weaker, onshore winds again.
So, if you’ve got the skill and patience, hold out for Sunday the 27th. That’s the one to circle on the calendar.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 20°C on Mon afternoon, min 14°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Thu morning. Very mild (max 17°C on Fri night, min 14°C on Thu night). Winds decreasing (fresh winds from the WNW on Thu afternoon, light winds from the WSW by Sat night). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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 9 | W 9 | WSW 6 | W 8 | W 8 | W 9 | W 10 | W 11 | W 10 | WNW 7 | WNW 8 | WNW 8 | W 8 | W 8 | W 7 | W 7 | W 8 | W 10 | W 10 | W 10 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 160 | 150 | 64 | 300 | 286 | 377 | 644 | 441 | 400 | 394 | 385 | 509 | 198 | 258 | 199 | 206 | 216 | 369 | 268 | 219 | 136 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 8:19PM6.96m | 8:36AM6.71m | 8:53PM6.53m | 9:09AM6.30m | 9:28PM6.02m | 9:44AM5.81m | 10:05PM5.47m | 10:25AM5.30m | 10:51PM4.94m | 11:19AM4.82m | 11:59PM4.51m | 12:45PM4.52m | 1:44AM4.38m | ||||||||
Low Tide | 2:13PM0.27m | 2:30AM0.46m | 2:45PM0.61m | 3:01AM0.87m | 3:18PM1.04m | 3:33AM1.35m | 3:53PM1.54m | 4:10AM1.86m | 4:36PM2.05m | 4:58AM2.34m | 5:40PM2.50m | 6:19AM2.69m | 7:27PM2.69m | ||||||||
 |  |  | | | |  | |  |  | | | | | | | |  | | |  | |
 | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — |
 | — | 7:36 | — | — | 7:34 | — | — | 7:31 | — | — | 7:30 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — |
mm | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 18 | 16 | 16 | 16 | 14 | 15 | 16 | 16 | 16 | 15 | 16 | 16 | 17 | 17 | 17 | 17 | 19 | 19 | 17 |
Feels °C | 18 | 18 | 17 | 11 | 10 | 12 | 8 | 11 | 11 | 11 | 10 | 10 | 11 | 11 | 14 | 14 | 15 | 17 | 18 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 12 | W 8 | — | — | W 9 | W 10 | W 11 | — | — | — | — | WNW 10 | W 12 | WNW 12 | WNW 11 | W 10 | W 10 | W 10 | W 10 | W 8 |
| kJ | 160 | 3 | 34 | — | — | 377 | 644 | 441 | — | — | — | — | 150 | 78 | 48 | 41 | 75 | 369 | 268 | 219 | 136 |
Swell 2 Height (m) Direction Period (s) | — | — | W 12 | — | — | — | — | — | — | — | — | — | NNW 5 | NNW 5 | W 16 | W 16 | W 15 | — | W 17 | WNW 15 | WNW 14 |
| kJ | — | — | 3 | — | — | — | — | — | — | — | — | — | 8 | 2 | 5 | 5 | 5 | — | 5 | 47 | 64 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | W 9 | WSW 6 | W 8 | W 8 | NNW 5 | NNW 6 | NNW 6 | W 10 | WNW 7 | WNW 8 | WNW 8 | W 8 | W 8 | W 7 | W 7 | W 8 | — | — | — | — |
| kJ | — | 150 | 64 | 300 | 286 | 12 | 69 | 36 | 400 | 394 | 385 | 509 | 198 | 258 | 199 | 206 | 216 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 250 | 250 | 86 | 38 | 250 | 227 | 116 | 568 | 86 | 309 | 258 | 227 | 240 | 14 | 4 | 14 | 14 | 0 |
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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