
Surf Forecasts:
St Agnes surf forecast from 12 Sep 2026:
- Best quality surf: Monday 14 Sep, 1AM (local time) - 4ft (1.2m), 10s period, W swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 4AM (local time) - 5ft (1.6m), 12s period, WNW swell with 743 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 1AM (local time) - 4ft (1.2m), 10s 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 Monday (Sep 14) at 1AM. The primary swell is predicted to be 1.2m and 10s period with a secondary swell of 0.1m and 13s. 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 1.6m 12s and forecast to arrive on Friday (Sep 18) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Wednesday (Sep 16) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 14th Sep) | 4ft (1.2m) 10s |
| Best Surf | 1AM (Mon 14th Sep) | 4ft (1.2m) 10s |
| Most Powerful | 4AM (Fri 18th Sep) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what we’ve got coming up for St Agnes.
Honestly mate, the next couple of weeks are a bit of a mixed bag, and we've got a long dry spell to kick things off. Not a lot to get excited about for a while.
The first few days are a write-off, with poor surf conditions and onshore or cross-off winds mushing up the swell. The water is sitting at about 64°, which is a touch warmer than normal for this time of year, but that’s the only thing working in our favour initially.
There’s a bit of a bump showing for the morning of Friday the 18th of September. The swell is from the WNW with a 5 ft and a long period of 13 seconds, offering some moderate wave energy (672). But it’s a cross-on wind, and the conditions are described as marginal. It might be a session for those who are keen to get wet, but it’s not going to be anything special. Later that day the wind swings cross-shore and the waves drop off.
The real standout, the one that might be worth circling on the calendar, is the morning of Sunday the 20th of September. We’re looking at a 8 ft swell from the W, with an 8-second period. A big increase in size means the energy is ramping up (820), but caution here – this is likely too big for beginners, and with the wind coming in at 19 mph from the WSW cross-shore, the surface is going to be lumpy and messy. It’s not a clean, glassy day. The surf is still described as poor conditions, so the wind is really going to chop things up. If you're an experienced surfer and you don't mind a bumpy, powerful wave, you might find some fun, but don't expect perfection.
After that, we see a drop in energy and size, with some smaller, clean days around the 25th and 26th of September, but only small, ordinary waves on offer. The best of the second week is the morning of Sunday the 27th of September, where we’ve got a 6 ft swell from the WNW with a cross-off wind and clean conditions. The period is short at 7 seconds, but the energy is moderate (370). It’s marginal, but if you’re patient, it could offer a few fun ones.
So, to sum it up: St Agnes is not delivering any world-class days in this window. If you’re a beginner, stay away on the 20th when it gets big and messy. For everyone else, the morning of the 27th is your best bet for some clean, punchy waves, even if they aren’t huge. Heads up for crowds at St Agnes – it gets busy often.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 20°C on Mon morning, min 17°C on Sat morning). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Wed night. Very mild (max 17°C on Tue morning, min 14°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 10 | W 10 | W 10 | W 10 | W 9 | W 8 | W 8 | WNW 8 | WNW 8 | W 8 | W 10 | WNW 10 | W 10 | WNW 7 | WNW 7 | WNW 10 | WNW 13 | WNW 12 | WNW 12 |
Wave Graph | |||||||||||||||||||||
239 | 418 | 724 | 578 | 432 | 262 | 189 | 169 | 130 | 350 | 424 | 333 | 499 | 588 | 468 | 277 | 292 | 544 | 660 | 519 | 203 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-off |
High Tide | 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 | 10:05AM4.86m | 10:31PM4.52m | ||||||||
Low Tide | 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 | 4:23PM1.89m | ||||||||
6:50 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | |
— | 7:42 | — | — | 7:39 | — | — | 7:37 | — | — | 7:36 | — | — | 7:32 | — | — | 7:30 | — | — | 7:29 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 1 | 1 | — | — | — | — | — |
Temp °C | 18 | 19 | 18 | 18 | 19 | 19 | 20 | 20 | 18 | 17 | 16 | 16 | 14 | 14 | 16 | 16 | 16 | 15 | 16 | 17 | 16 |
Feels °C | 13 | 15 | 16 | 17 | 19 | 19 | 18 | 18 | 17 | 13 | 11 | 13 | 9 | 9 | 12 | 10 | 11 | 10 | 14 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 14 | NW 12 | S 14 | SW 13 | W 10 | W 10 | W 9 | W 8 | W 8 | SW 11 | S 11 | W 8 | W 10 | WNW 10 | N 5 | W 10 | WNW 9 | S 13 | WNW 13 | WNW 12 | WNW 12 |
20 | 40 | 4 | 7 | 432 | 262 | 189 | 169 | 130 | 5 | 2 | 333 | 499 | 588 | 14 | 90 | 144 | 3 | 660 | 519 | 203 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 15 | S 14 | SW 13 | SW 13 | S 13 | SW 12 | SW 12 | WNW 12 | — | — | S 11 | NW 12 | S 13 | S 13 | N 5 | — | — | SW 12 | S 12 | SW 16 |
8 | 8 | 4 | 7 | 7 | 3 | 6 | 6 | 27 | — | — | 2 | 38 | 4 | 4 | 2 | — | — | 6 | 3 | 10 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | SW 12 | — | — | — | S 11 | — | — | — | — | S 18 | S 18 | S 15 | S 12 |
— | — | — | — | — | — | — | — | 6 | — | — | — | 2 | — | — | — | — | 6 | 6 | 4 | 3 | |
Wind waves Height (m) Direction Period (s) | W 8 | W 8 | W 10 | W 10 | — | — | — | — | — | WNW 8 | WNW 8 | N 5 | N 6 | N 6 | W 10 | WNW 7 | WNW 7 | WNW 10 | — | — | WSW 6 |
239 | 418 | 724 | 578 | — | — | — | — | — | 350 | 424 | 22 | 75 | 42 | 468 | 277 | 292 | 544 | — | — | 91 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 197 | 213 | 15 | 98 | 53 | 0 | 15 | 15 | 0 | 155 | 153 | 103 | 153 | 103 | 213 | 213 | 222 | 222 | 15 | 231 | 15 |
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.










