Surf Forecasts:
Port Isaac surf forecast from 17 Jul 2026:
- Most powerful swell: Wednesday 22 Jul, 10PM (local time) - 4ft (1.2m), 6s period, NNW swell with 84 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 1.2m 6s and forecast to arrive on Wednesday (Jul 22) at 10PM. 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+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Wed 22nd Jul) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Port Isaac over the next 16 days.
The Lowdown
Alright, let’s have a look at this one. I’m going to be straight with you – the outlook for Port Isaac over the next 16 days is a real struggle. There are no good surf options on offer here. The whole stretch from 17 July right through to 1 August is a total write-off.
We start with Friday 17 July – the swell is tiny, just 0.7 ft from the west, with a short period of 8 seconds. The wind is onshore, then cross-shore, and the wave energy is next to nothing (9–10). It’s just poor surf conditions. Saturday 18 July sees a slight bump to 2–3 ft from the NNW, but the period drops to 5 seconds, and the wind is straight onshore, blowing at 12–19 mph. The combined energy creeps up to 41, but it’s still messy and weak. Sunday 19 July is more of the same – onshore wind, short period, poor quality.
The whole first week is a grind. The wind is almost always onshore or cross-onshore, and the swell stays small, mostly under 3 ft, with periods flitting between 4 and 10 seconds. The energy never gets above 81, and that’s only for a brief moment. There’s no clean window, no proper swell direction aligning with the optimum WNW for Port Isaac. Even when the wind drops to a light breeze on 21 July, the swell is a pathetic 1 ft – not worth paddling for.
Towards the end of the month, on 25 July, we see the biggest swell of the period – 5 ft from the WNW, with a period of 6 seconds. The energy jumps to 195–207, which is moderate, but it’s still onshore wind at 16 mph. That’s a choppy, blown-out mess, not a good surf. For a beginner spot like Port Isaac, anything over 5 ft starts to get a bit much, but with the wind on it, it’s just ugly.
The last few days, from 29 July to 1 August, the swell fades back to 1–2 ft, with periods of 8–11 seconds. The wind stays onshore or cross-onshore. The combined energy drops to 30–68. There’s no standout, no hidden gem.
This is a classic blank run for this area – it happens. The forecasts can change, but right now, there’s nothing to get excited about. If you’re a beginner, you’d be wasting your time. For anyone else, it’s a good week to check the tides, fix your gear, and wait for the next proper swell.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Fri morning, min 13°C on Sat night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sat afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Tue morning, min 14°C on Tue night). Winds increasing (light winds from the E on Sun night, fresh winds from the N by Wed afternoon). | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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 8 | W 8 | NNW 4 | NNW 5 | NNW 5 | N 5 | NNW 5 | N 4 | NNW 4 | W 9 | NNW 5 | NNW 5 | W 10 | W 10 | NNW 5 | N 4 | NNW 5 | NNW 5 | N 4 | NNW 4 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 12 | 23 | 32 | 57 | 10 | 9 | 21 | 7 | 13 | 37 | 18 | 17 | 26 | 24 | 55 | 48 | 17 | 15 | 5 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | on | on | on | cross | cross | on | cross-on | on | on | cross-on | cross-on | on | on | on | on | cross-on | on | on | cross-on |
High Tide | 8:18AM6.91m | 8:39PM7.22m | 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 | |||||||
Low Tide | 2:33PM0.25m | 3:02AM0.23m | 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 | ||||||||
 | |  | | |  | | | | | | | | | | | | | | | | |
 | 5:24 | — | — | 5:26 | — | — | 5:28 | — | — | 5:28 | — | — | 5:30 | — | — | 5:31 | — | — | 5:33 | — | — |
 | — | — | 9:23 | — | — | 9:22 | — | — | 9:22 | — | — | 9:21 | — | — | 9:20 | — | — | 9:17 | — | — | 9:16 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 18 | 18 | 18 | 16 | 20 | 19 | 18 | 19 | 19 | 16 | 22 | 20 | 17 | 17 | 18 | 17 | 16 | 17 | 17 |
Feels °C | 21 | 20 | 17 | 15 | 13 | 12 | 13 | 13 | 15 | 15 | 15 | 13 | 19 | 16 | 15 | 12 | 13 | 13 | 12 | 14 | 16 |
Swell 1 Height (m) Direction Period (s) | NNW 4 | W 8 | W 8 | W 8 | W 8 | W 8 | NNW 5 | W 7 | W 9 | NNW 4 | W 11 | WNW 11 | NNW 5 | W 10 | W 10 | W 10 | W 9 | W 9 | W 9 | W 9 | NNW 4 |
| kJ | 3 | 5 | 5 | 5 | 5 | 5 | 10 | 4 | 2 | 7 | 10 | 22 | 14 | 17 | 17 | 16 | 15 | 14 | 14 | 13 | 3 |
Swell 2 Height (m) Direction Period (s) | W 8 | W 13 | W 13 | — | W 14 | — | W 7 | W 19 | W 7 | W 9 | W 8 | W 8 | W 10 | W 16 | W 16 | — | — | W 15 | W 15 | — | W 8 |
| kJ | 5 | 3 | 3 | — | 4 | — | 4 | 7 | 1 | 6 | 1 | 1 | 18 | 5 | 5 | — | — | 4 | 4 | — | 5 |
Swell 3 Height (m) Direction Period (s) | SW 6 | S 6 | — | — | — | — | — | W 10 | W 12 | W 11 | W 8 | W 18 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 1 | — | — | — | — | — | 2 | 3 | 3 | 1 | 6 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NW 3 | NNW 4 | NNW 5 | NNW 5 | N 5 | NE 3 | N 4 | NNW 4 | — | NNW 5 | NNW 5 | — | NNW 5 | NNW 5 | N 4 | NNW 5 | NNW 5 | N 4 | NNW 4 | WNW 4 |
| kJ | — | 2 | 12 | 23 | 32 | 57 | 1 | 9 | 21 | — | 13 | 37 | — | 14 | 26 | 24 | 55 | 48 | 17 | 15 | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 887 | 405 | 542 | 542 | 29 | 83 | 549 | 396 | 84 | 394 | 267 | 15 | 726 | 312 | 784 | 778 | 202 | 488 | 539 | 506 |
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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