
Surf Forecasts:
Port Isaac surf forecast from 16 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 4PM (local time) - 3ft (0.9m), 16s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 23 Sep, 7AM (local time) - 4.5ft (1.4m), 14s period, W swell with 791 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 1AM (local time) - 4ft (1.2m), 7s 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 1AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.8m and 10s. 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 1.4m 14s and forecast to arrive on Wednesday (Sep 23) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 20th Sep) | 4ft (1.2m) 7s |
| Best Surf | 4PM (Tue 22nd Sep) | 3ft (0.9m) 16s |
| Most Powerful | 7AM (Wed 23rd Sep) | 4.5ft (1.4m) 14s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's look at what we've got for the next couple of weeks around Port Isaac. It’s a mixed bag, honestly, with a long dry spell in the middle, but we do get a little window of something special if you're patient.
We start off on Wednesday the 16th, and it's pretty grim. There's a 6ft WNW groundswell pushing in, with moderate wave energy (740), but that northwest wind is howling at 16 mph. The water temp is sitting at 64°, a touch warmer than normal for this time of year, but you won't be enjoying that because the surface is chopped to bits. Honestly, through the rest of that week and into the weekend, the wind doesn't ease up. We're looking at poor conditions day after day with lumpy, choppy seas. Stay dry.
Then comes a proper gap. From Sunday the 21st through to the morning of Thursday the 24th, the swell just backs right off. We're talking tiny, un-rideable waves, with combined energy dropping down to those two-digit numbers, like 94 and 65. It's flat. Don't bother checking it.
Now, here's the one for the diary. The standout moment is Tuesday the 22nd. After that quiet spell, things come alive for just a day. In the morning, we get a 3ft cross-off swell with a 12-second period, and combined energy jumping to 294—a sign of quality. The wind goes light and offshore from the east, which is going to make Port Isaac look fantastic. But get this: by the afternoon, it gets even better. The swell bumps up to 3ft from the WNW, and the period stretches to a very long 16 seconds. The energy spikes to 719, telling you there's proper push behind it. With a light east cross-off breeze, that wave is going to be clean as a whistle. You’ll be looking at long, lined-up walls. Just keep in mind, the optimum swell direction is from the WNW, and we have it, but that long-period groundswell at a beach break can make it a bit walled and dumpy, so pick your peak wisely. This is the best on offer by a mile.
After that brief moment of glory, it’s back to small, clean but unexciting surf for the following days. The 23rd is rideable but marginal. By the time we get into the last week of September and the start of October, the energy drops again. The 29th of September afternoon shows a 6ft W swell with 630 energy, but the "poor surf conditions" tag and the strong cross-off wind suggests it's not the day for Port Isaac, a fairly exposed spot.
So, to wrap it up: there's a rough, windy start, a long flat spell, and then a very promising window on Tuesday the 22nd. That's your one true standout. After that, we're back to small, clean but ultimately unexciting conditions. Keep your eyes on that Tuesday.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Very mild (max 18°C on Fri night, min 14°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 16°C on Sun afternoon). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 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) | WNW 10 | W 11 | W 10 | WNW 8 | WNW 8 | WNW 7 | W 8 | W 12 | W 8 | W 8 | W 8 | W 7 | W 10 | W 10 | W 10 | W 10 | W 10 | W 9 | W 12 | WNW 16 | WNW 15 |
Wave Graph | |||||||||||||||||||||
740 | 441 | 164 | 416 | 406 | 252 | 259 | 723 | 443 | 337 | 336 | 156 | 290 | 206 | 127 | 94 | 65 | 61 | 180 | 448 | 639 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross | cross | cross-off | cross-on | cross-on | glassy | cross | cross-on | glassy | cross-off | cross-off | cross-off |
High Tide | 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 | 2:31PM4.63m | 3:14AM4.67m | 3:41PM5.06m | |||||||||
Low Tide | 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 | 8:14AM2.68m | 9:06PM2.45m | 9:32AM2.31m | 10:06PM1.99m | ||||||||
6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | |
— | 7:31 | — | — | 7:30 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — | — | 7:17 | — | |
mm | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 15 | 16 | 15 | 16 | 16 | 18 | 17 | 17 | 17 | 17 | 17 | 16 | 19 | 20 | 19 | 21 | 21 | 20 |
Feels °C | 11 | 11 | 11 | 9 | 10 | 10 | 12 | 10 | 15 | 14 | 15 | 17 | 17 | 16 | 17 | 19 | 20 | 20 | 20 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | W 11 | W 10 | — | — | WNW 7 | NNW 5 | — | WNW 12 | WNW 11 | WNW 11 | W 7 | W 10 | W 10 | W 10 | W 10 | W 10 | W 9 | W 12 | W 12 | WNW 15 |
740 | 441 | 164 | — | — | 252 | 5 | — | 29 | 25 | 24 | 156 | 290 | 206 | 127 | 94 | 65 | 61 | 180 | 271 | 639 | |
Swell 2 Height (m) Direction Period (s) | — | NNW 5 | — | — | — | W 10 | — | — | W 16 | W 16 | — | W 10 | — | — | — | — | — | — | WNW 18 | WNW 16 | W 11 |
— | 21 | — | — | — | 184 | — | — | 5 | 5 | — | 127 | — | — | — | — | — | — | 114 | 448 | 181 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | W 6 | WNW 8 | WNW 8 | — | W 8 | W 12 | W 8 | W 8 | W 8 | — | — | — | — | — | — | — | — | — | — |
— | — | 112 | 416 | 406 | — | 259 | 723 | 443 | 337 | 336 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 250 | 227 | 227 | 250 | 116 | 227 | 258 | 227 | 221 | 14 | 0 | 14 | 14 | 0 | 3 | 6 | 3 | 0 | 0 | 0 |
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.










