Surf Forecasts:
Port Isaac surf forecast from 11 Aug 2026:
- Best quality surf: Wednesday 12 Aug, 4AM (local time) - 2ft (0.6m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Thursday 13 Aug, 10AM (local time) - 3.5ft (1.0m), 11s period, W swell with 224 kJ wave energy.
- Next surfable swell (1★+): Wednesday 12 Aug, 4AM (local time) - 2ft (0.6m), 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 Wednesday (Aug 12) at 4AM. The primary swell is predicted to be 0.6m and 11s period. 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 1.0m 11s and forecast to arrive on Thursday (Aug 13) at 10AM. 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 (Wed 12th Aug) | 2ft (0.6m) 11s |
| Best Surf | 4AM (Wed 12th Aug) | 2ft (0.6m) 11s |
| Most Powerful | 10AM (Thu 13th Aug) | 3.5ft (1.0m) 11s |
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 on the menu for Port Isaac over the next couple of weeks.
To be straight up with you, it’s a pretty tough stretch. The first week and a half is a real struggle, with very little to get excited about. The waves are just not cooperating, and the wind is a constant problem. There’s a big gap of poor to non-existent surf from the start all the way through to late in the period. You’re looking at nearly two weeks of mostly onshore or cross-onshore winds and weak, short-period junk. The only real pulse of energy comes in the second week, but it’s buried under poor conditions.
The first proper window of interest is a long way off, on Monday the 24th of August. The afternoon brings a jump in size with a 6ft swell from the west, but the wind is screaming from the north at 22 mph, straight onshore and lumpy. The combined wave energy is a solid 362 (moderate), but it’s a complete mess. Honestly, this one looks more interesting for the kite surfers than for anyone on a paddleboard.
The real standout, if you can call it that, is on Wednesday the 26th of August. The morning sees a pulse of 4ft swell from the west-southwest with a light wind from the same direction, creating a cross-shore breeze. The water is a very unusual 66° (much warmer than normal for this time of year). The combined energy is 135 (moderate), but the period is a short 6 seconds, so it’s not going to have much grunt.
However, the afternoon of the 26th is the best on offer. The swell jumps to 7ft from the west, with a period of 8 seconds, pushing the combined energy right up to 527 (strong). The wind is a gentle cross-onshore from the west-northwest at 9 mph. This is a lot of water moving, over 8ft, so this is strictly for experienced surfers only. The wind isn’t perfect, but it’s the best combination of size and energy we get in the whole run. It’s a long way out, so take the promise with a grain of salt, but it’s the only flicker of life in a bleak forecast.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 18°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 20°C on Fri afternoon, min 14°C on Sat night). Winds decreasing (fresh winds from the N on Sat afternoon, light winds from the N by Sun night). | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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 11 | W 10 | W 10 | W 10 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | N 5 | W 8 | N 5 | W 7 | W 7 | W 7 | W 7 | W 8 | W 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 10 | 60 | 96 | 88 | 115 | 224 | 196 | 184 | 133 | 127 | 140 | 74 | 54 | 53 | 17 | 23 | 9 | 8 | 33 | 41 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | off | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | cross-on |
High Tide | 5:19PM6.54m | 5:46AM6.54m | 6:08PM7.01m | 6:33AM6.88m | 6:53PM7.33m | 7:15AM7.07m | 7:34PM7.45m | 7:55AM7.09m | 8:14PM7.35m | 8:34AM6.93m | 8:52PM7.05m | 9:11AM6.63m | 9:30PM6.61m | |||||||
Low Tide | 11:45PM0.59m | 12:04PM0.52m | 00:33AM0.20m | 12:49PM0.19m | 1:16AM-0.03m | 1:30PM0.04m | 1:55AM-0.06m | 2:08PM0.07m | 2:33AM0.10m | 2:46PM0.28m | 3:08AM0.42m | 3:22PM0.62m | 3:43AM0.85m | |||||||
 |  | | | | | |  |  | | | | | | |  |  | | | | |
 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — |
 | 8:46 | — | — | 8:45 | — | — | 8:44 | — | — | 8:42 | — | — | 8:39 | — | — | 8:37 | — | — | 8:36 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 23 | 21 | 28 | 28 | 22 | 21 | 21 | 19 | 20 | 20 | 17 | 18 | 18 | 16 | 17 | 17 | 16 | 18 | 18 | 17 |
Feels °C | 21 | 19 | 26 | 27 | 22 | 19 | 20 | 19 | 20 | 19 | 16 | 13 | 13 | 11 | 14 | 13 | 13 | 14 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 11 | W 10 | W 10 | W 10 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | W 7 | W 7 | W 7 | NNW 4 | W 8 | W 8 |
| kJ | 10 | 60 | 96 | 88 | 115 | 224 | 196 | 184 | 133 | 127 | 140 | 61 | 54 | 28 | 17 | 23 | 9 | 2 | 33 | 41 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 7 | W 18 | NNW 4 |
| kJ | 7 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | 6 | 2 |
Swell 3 Height (m) Direction Period (s) | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 10 | — | W 16 |
| kJ | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | N 5 | NNW 5 | N 5 | N 4 | N 4 | NNW 3 | — | NNW 3 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 74 | 49 | 53 | 13 | 2 | 2 | — | 3 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 228 | 3 | 0 | 0 | 0 | 38 | 249 | 14 | 85 | 289 | 69 | 226 | 226 | 258 | 407 | 289 | 482 | 358 | 288 | 6 |
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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