Surf Forecasts:
Port Isaac surf forecast from 15 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 1PM (local time) - 5ft (1.5m), 9s period, W swell with 348 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 1.5m 9s and forecast to arrive on Thursday (Aug 20) at 1PM. 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 | 1PM (Thu 20th Aug) | 5ft (1.5m) 9s |
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 Port Isaac has in store for us over the next couple of weeks. Straight up, I gotta be honest with you – this is a pretty quiet run. The first wave of any note doesn’t show up until we’re well into the forecast, so don't be in a rush to wax up.
Right from the off, we’ve got a long gap. For the first several days, from Saturday the 15th right through the end of the following week, there’s just nothing doing. The swell is tiny, the wind is mostly onshore or cross-onshore, and everything is tagged as poor surf conditions. There’s a bit of a bump on Thursday the 20th with some 5ft swell from the W and moderate wave energy (312), but it’s completely ruined by a fresh cross-onshore breeze. That setup looks more interesting for kite surfing than paddle surfing, to be honest.
We finally get something half-decent worth mentioning on Sunday the 23rd of August. The morning session at Port Isaac is looking clean. We’ve got a light cross-offshore wind from the E at 19 mph, and that’s scrubbing the surface up nice. The swell is tiny though, only 3ft from the NE with a super short period of 4 seconds and weak energy (57). It’s small, but for a Sunday morning with glassy conditions, you might pick off a few little rollers if you’re on the right board. Remember, short period swell like that doesn’t have much push.
The standout, and I mean the only real standout in this whole 16-day window, looks to be Friday the 28th of August. This is the one to circle on your calendar. We’ve got a morning session at Port Isaac with glassy conditions – wind is virtually nothing from the SE at 3 mph. The swell is 1ft from the W, but check this out: the period jumps to 10 seconds. That’s a proper little groundswell pulse. The combined energy is weak (28), so it’s not going to be pumping, but that long period means the waves that do come through will have some shape and push for their size. The water temperature is about average for the time of year too. It’s small, clean, and a long way off, so keep an eye on it – those long-range calls can be promising but less certain.
The following weekend, Saturday the 29th and Sunday the 30th of August, stays small but clean with cross-offshore breezes and waist-high dribblers from the W. Not a stand out, but a nice way to end the run if you just want to get wet.
So, there you have it. A long dry spell, a flicker of hope on the 23rd, and one real target on Friday the 28th. It tends not to stay this poor for long around here, and forecasts can change, so don’t write it off completely.
Rusty.
Short Range ForecastMostly dry. Very mild (max 19°C on Sun morning, min 15°C on Sat night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Wed night. Warm (max 20°C on Tue morning, min 15°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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 | W 8 | W 7 | W 7 | W 7 | WNW 6 | W 8 | W 7 | W 6 | W 6 | W 6 | WNW 6 | W 6 | WNW 7 | W 8 | W 9 | W 9 | WNW 7 | WNW 6 | W 8 |
Wave Graph | |||||||||||||||||||||
46 | 57 | 40 | 17 | 9 | 9 | 40 | 33 | 61 | 91 | 69 | 56 | 98 | 69 | 186 | 308 | 318 | 293 | 107 | 58 | 61 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on |
High Tide | 8:14PM7.35m | 8:34AM6.93m | 8:52PM7.05m | 9:11AM6.63m | 9:30PM6.61m | 9:48AM6.22m | 10:08PM6.08m | 10:27AM5.75m | 10:49PM5.52m | 11:11AM5.27m | 11:38PM5.00m | 12:09PM4.84m | 00:48AM4.62m | ||||||||
Low Tide | 2:08PM0.07m | 2:33AM0.10m | 2:46PM0.28m | 3:08AM0.42m | 3:22PM0.62m | 3:43AM0.85m | 3:58PM1.07m | 4:19AM1.34m | 4:37PM1.56m | 4:59AM1.84m | 5:24PM2.04m | 5:51AM2.29m | 6:30PM2.44m | ||||||||
6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:15 | — | — | |
— | 8:39 | — | — | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:28 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 2 | 3 | — | — | 5 | 1 | 1 | 3 | — | — | — |
Temp °C | 18 | 18 | 16 | 19 | 19 | 19 | 19 | 18 | 18 | 20 | 19 | 18 | 18 | 18 | 16 | 18 | 18 | 16 | 17 | 16 | 15 |
Feels °C | 14 | 13 | 12 | 16 | 16 | 19 | 19 | 16 | 17 | 19 | 18 | 16 | 13 | 13 | 12 | 14 | 14 | 13 | 12 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 8 | W 7 | W 7 | W 7 | WNW 6 | W 8 | N 4 | W 17 | W 8 | W 17 | WNW 6 | W 16 | W 9 | W 8 | SW 14 | W 9 | WNW 7 | W 9 | W 8 |
46 | 57 | 40 | 17 | 9 | 9 | 40 | 33 | 1 | 6 | 5 | 6 | 98 | 5 | 42 | 308 | 8 | 293 | 107 | 37 | 61 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | W 5 | W 18 | WNW 9 | W 18 | — | — | W 17 | — | W 16 | — | SW 16 | W 15 | — | W 14 | W 9 | W 16 | NNW 5 |
— | — | — | — | 4 | 6 | 17 | 6 | — | — | 6 | — | 5 | — | 10 | 4 | — | 4 | 78 | 5 | 4 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 18 | — | — | — | — | — | — | — | — | — | — | — | W 16 | W 13 | W 16 |
— | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | 5 | 3 | 5 | |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | N 4 | NNW 4 | W 4 | — | WNW 5 | W 7 | W 6 | W 6 | W 6 | — | W 6 | WNW 7 | — | W 9 | — | — | WNW 6 | — |
35 | 30 | 32 | 9 | 2 | 9 | — | 23 | 61 | 91 | 69 | 56 | — | 69 | 186 | — | 318 | — | — | 58 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 288 | 520 | 237 | 237 | 408 | 488 | 288 | 424 | 227 | 240 | 801 | 69 | 289 | 505 | 315 | 113 | 540 | 44 | 61 | 61 | 61 |
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.











