Surf Forecasts:
Port Isaac surf forecast from 18 Jul 2026:
- Most powerful swell: Thursday 23 Jul, 1AM (local time) - 4.5ft (1.4m), 6s period, NNW swell with 145 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 1.4m 6s and forecast to arrive on Thursday (Jul 23) at 1AM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 23rd Jul) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Right then, let’s talk about what’s on offer. I’ve been through the charts, and I’ve got to be straight with you – it’s a tough run for Port Isaac. The entire 16-day window is a bit of a write-off, with no sessions that are worth getting excited about.
The water is sitting at 64°, which is a touch warmer than we’d normally expect for this time of year, so that’s a small comfort if you’re just paddling around.
The pattern is pretty grim. From Friday the 17th right through to Friday the 31st of July, it’s a steady stream of poor surf conditions. Onshore winds are relentless, mostly from the north or north-northwest, and the swell is tiny or mismatched. The wind is just howling onshore for most of it, and the wave energy is weak. You’ll see a combined energy of just 11 (Friday 17th), and it rarely climbs above 100 until the very end of July.
There’s a slight bump in size on Monday the 27th of July, with a 6ft swell from the west-northwest and a period of 7 seconds. The combined energy jumps to 352 (Monday morning) and 394 (Monday afternoon), which is a moderate energy, but it’s all cross-onshore wind from the northwest. That’s going to be chopped up, messy, and ugly. It’s more of a kite-surfing proposition than a clean paddle session.
The rest of the first week of August looks similar – a bit of size on the 1st, with 4ft swell from the west-northwest, but again, it’s blown out by onshore winds. The combined energy is moderate (134 to 143), but the quality just isn’t there.
Honestly, there’s no standout. Not one. It’s a blank run. The conditions are poor, the wind is wrong, and the swell is either too small or too messy. If you’re desperate, you might get a bodysurf in, but for a proper surf, you’ll be waiting a long time. Forecasts can change, but right now, this is a period to leave the boards in the shed.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sun morning, min 15°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Tue morning, min 14°C on Tue night). Winds decreasing (fresh winds from the N on Wed afternoon, light winds from the WNW by Thu afternoon). | ||||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 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) | NNW 4 | NNW 5 | NNW 5 | NNW 6 | W 19 | NNW 4 | NNW 4 | NNW 5 | NNW 5 | W 10 | W 10 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 5 | NNW 4 | NNW 4 | W 8 | W 8 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 18 | 38 | 42 | 18 | 7 | 14 | 15 | 17 | 30 | 18 | 17 | 30 | 43 | 32 | 145 | 35 | 12 | 7 | 6 | 5 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross | cross | on | cross-on | cross-on | on | cross-on | cross | on | cross-on | on | on | cross-on | cross-on | cross-on | glassy | cross | cross-on | cross |
High Tide | 9:02AM6.72m | 9:23PM6.95m | 9:46AM6.42m | 10:07PM6.55m | 10:30AM6.04m | 10:51PM6.07m | 11:16AM5.64m | 11:40PM5.58m | 12:08PM5.26m | 00:36AM5.16m | 1:09PM4.98m | 1:43AM4.89m | 2:21PM4.88m | 2:57AM4.85m | |||||||
Low Tide | 3:16PM0.45m | 3:45AM0.53m | 3:59PM0.78m | 4:28AM0.93m | 4:43PM1.19m | 5:12AM1.36m | 5:30PM1.61m | 6:00AM1.78m | 6:24PM1.99m | 6:56AM2.12m | 7:30PM2.25m | 8:06AM2.30m | 8:46PM2.31m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — | 5:33 | — | — |
 | — | — | 9:22 | — | — | 9:22 | — | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 | — | — | 9:15 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 17 | 21 | 20 | 18 | 20 | 19 | 18 | 24 | 23 | 19 | 16 | 19 | 17 | 17 | 19 | 17 | 20 | 19 | 17 |
Feels °C | 15 | 13 | 14 | 16 | 15 | 15 | 16 | 15 | 16 | 21 | 18 | 17 | 12 | 14 | 12 | 16 | 19 | 17 | 18 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | NNW 5 | NNW 6 | W 7 | W 9 | W 9 | W 11 | NNW 5 | NNW 5 | W 10 | W 10 | W 9 | W 9 | W 9 | NNW 5 | W 9 | NNW 4 | NNW 3 | W 8 | W 8 |
| kJ | 5 | 5 | 42 | 18 | 4 | 2 | 6 | 10 | 30 | 14 | 17 | 17 | 16 | 15 | 14 | 35 | 6 | 7 | 1 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | — | — | W 8 | W 7 | W 19 | W 7 | W 11 | W 8 | WNW 11 | W 10 | W 16 | W 16 | — | — | W 15 | W 9 | — | W 8 | W 8 | — | — |
| kJ | — | — | 5 | 4 | 7 | 1 | 3 | 1 | 22 | 18 | 5 | 5 | — | — | 4 | 6 | — | 6 | 6 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | W 10 | W 12 | — | W 8 | W 8 | — | — | — | — | — | — | W 15 | — | — | W 13 | — | — |
| kJ | — | — | — | — | 2 | 3 | — | 1 | 1 | — | — | — | — | — | — | 4 | — | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNW 5 | — | ENE 4 | N 3 | NNW 4 | NNW 4 | NNW 5 | — | — | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | — | NNW 4 | — | — | NNW 3 | — |
| kJ | 18 | 38 | — | 1 | 5 | 14 | 15 | 17 | — | — | 17 | 30 | 43 | 32 | 145 | — | 12 | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 407 | 542 | 37 | 396 | 67 | 394 | 393 | 394 | 267 | 15 | 67 | 312 | 312 | 227 | 258 | 37 | 508 | 460 | 407 | 424 | 410 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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