Surf Forecasts:
St Agnes surf forecast from 11 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10PM (local time) - 4ft (1.2m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 10AM (local time) - 5.5ft (1.7m), 12s period, WNW swell with 819 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 1AM (local time) - 3.5ft (1.1m), 8s period with W swell.
Best Forecast Surf Conditions for St Agnes this week:
The surf forecast for St Agnes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 1AM. The primary swell is predicted to be 1.1m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at St Agnes in the next 16 days are 1.7m 12s and forecast to arrive on Friday (Sep 18) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sat 12th Sep) | 3.5ft (1.1m) 8s |
| Best Surf | 10PM (Sun 13th Sep) | 4ft (1.2m) 10s |
| Most Powerful | 10AM (Fri 18th Sep) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the cards for the coming weeks. Straight up, I gotta be honest with you – it’s a grim start. We’re looking at a long dry spell with basically nothing worth paddling out for until the end of the forecast window, so patience is the name of the game.
We’ve got a solid two-week gap of poor conditions ahead. From Friday the 11th all the way through to the middle of the week starting the 23rd, it’s one no-go after another. Strong onshore winds, messy chop, and a lot of “poor surf conditions” flags. There is some swell around, but the wind just ruins it every time. For the first few days, the water temp at St Agnes is sitting at 64°, which is a touch warmer than normal for this time of year.
The one bright spot – and it’s a real standout – looks like Saturday the 19th of September. Saturday morning we’ve got a clean, cross-offshore breeze from the SSW at a light 6 mph, with a 4 ft swell rolling in from the W at a period of 11 seconds. That’s a proper groundswell, and with light winds, it’ll be glassy. The combined wave energy is moderate at 284, but the quality makes up for it. This is a classic St Agnes moment – clean, tidy, and just enough push to have some fun. After lunch, it goes glassy with that SSE breeze dropping to 3 mph, so the afternoon session could be silky smooth, though the swell stays small at 4 ft. It won’t be pumping, but it’ll be surfable and clean.
Don’t get too excited about the following days though. Sunday the 20th has clean cross-off winds but a dropping swell. By Monday the 21st, there’s a weird little spike in energy with a 2 ft to 3 ft swell and a very long period of 14 seconds from the WNW, giving it a combined energy of 383, but the size is tiny and the period means it might just close out or be too straight for beach breaks. Wednesday the 23rd morning has a hopeful-looking 5 ft swell from the WNW at 13 seconds, energy of 799, and clean winds, but the forecast still calls it marginal. It’s one to watch, but I can’t call it a goer from here.
There’s nothing else I’d paddle out for. The swell drops right off after that, and by the 26th we’re down to knee-high dribble. So, if you’re itching for a wave, mark your calendar for Saturday the 19th. That’s your window. Until then, keep the board in the car and the wax in the wrapper.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Sat night. Very mild (max 19°C on Sat afternoon, min 15°C on Fri afternoon). Winds increasing (light winds from the W on Fri night, fresh winds from the SW by Sat afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 20°C on Mon morning, min 14°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 9 | W 9 | W 8 | W 8 | W 8 | W 10 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 10 | WNW 10 | WNW 8 | WNW 10 | WNW 11 | WNW 10 | WNW 7 | WNW 8 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 417 | 292 | 156 | 201 | 350 | 708 | 512 | 377 | 246 | 157 | 143 | 129 | 313 | 665 | 385 | 574 | 531 | 511 | 371 | 528 | 460 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-off | cross-off | cross-off | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | on | on | on | on | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 6:11PM6.74m | 6:31AM6.55m | 6:48PM6.80m | 7:07AM6.57m | 7:24PM6.68m | 7:41AM6.44m | 7:59PM6.41m | 8:15AM6.17m | 8:33PM6.00m | 8:49AM5.79m | 9:08PM5.53m | 9:25AM5.34m | 9:45PM5.02m | ||||||||
Low Tide | 12:14PM0.13m | 00:37AM-0.05m | 12:50PM0.01m | 1:11AM-0.04m | 1:25PM0.06m | 1:44AM0.13m | 1:58PM0.25m | 2:16AM0.43m | 2:30PM0.57m | 2:47AM0.82m | 3:03PM0.97m | 3:19AM1.26m | 3:39PM1.43m | 3:56AM1.72m | |||||||
 |  |  | | |  | | |  | | |  | | | | | | | | | | |
 | 6:48 | — | — | 6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — |
 | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:36 | — | — | 7:32 | — | — | 7:30 | — |
mm | — | — | — | — | — | 8 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 17 | 16 | 16 | 18 | 19 | 18 | 18 | 19 | 19 | 20 | 20 | 18 | 16 | 15 | 16 | 15 | 15 | 16 | 16 | 15 | 15 |
Feels °C | 15 | 14 | 14 | 14 | 15 | 16 | 18 | 19 | 20 | 19 | 18 | 18 | 11 | 9 | 11 | 11 | 11 | 12 | 11 | 9 | 11 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 8 | W 8 | WNW 13 | S 14 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 10 | SSW 6 | WNW 8 | WNW 10 | WNW 11 | N 6 | — | S 13 | WNW 11 |
| kJ | 417 | 292 | 156 | 201 | 32 | 4 | 512 | 377 | 246 | 157 | 143 | 129 | 313 | 3 | 385 | 574 | 531 | 17 | — | 3 | 145 |
Swell 2 Height (m) Direction Period (s) | — | S 16 | — | WNW 14 | SW 15 | — | SW 13 | SW 13 | S 13 | SW 12 | SW 12 | WNW 12 | S 11 | SW 11 | S 6 | S 11 | N 6 | S 13 | — | — | S 13 |
| kJ | — | 5 | — | 20 | 8 | — | 7 | 7 | 3 | 6 | 6 | 14 | 2 | 5 | 1 | 2 | 53 | 4 | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 15 | — | — | — | — | — | — | — | SW 12 | — | — | S 11 | — | — | — | — | — | — |
| kJ | — | — | — | 8 | — | — | — | — | — | — | — | 6 | — | — | 2 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 8 | W 10 | — | — | — | — | — | SSE 3 | NNW 3 | WNW 10 | N 5 | NNW 6 | — | WNW 10 | WNW 7 | WNW 8 | WNW 8 |
| kJ | — | — | — | — | 350 | 708 | — | — | — | — | — | 1 | 7 | 665 | 53 | 134 | — | 511 | 371 | 528 | 460 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 56 | 28 | 0 | 15 | 198 | 231 | 15 | 15 | 0 | 15 | 15 | 0 | 153 | 153 | 103 | 213 | 496 | 222 | 222 | 56 | |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the St Agnes Surf forecast
The above surf forecast table for St Agnes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at St Agnes can be found by selecting the local surf guide option on the grey menu. Our St Agnes 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 (St Agnes) 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 St Agnes 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.
St Agnes is 13 km (8 miles) from Camborne. If you plan a holiday in North Cornwall, look for hotels and other accommodation in Camborne. Camborne has rooms for a wide range of budgets as well as car hire and transport links.
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