
Surf Forecasts:
St Agnes surf forecast from 16 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 7PM (local time) - 5ft (1.6m), 16s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 23 Sep, 1AM (local time) - 6.5ft (2.0m), 15s period, W swell with 1,763 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 1AM (local time) - 5.5ft (1.7m), 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 Sunday (Sep 20) at 1AM. The primary swell is predicted to be 1.7m and 10s period with a secondary swell of 0.1m and 14s. 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 2.0m 15s and forecast to arrive on Wednesday (Sep 23) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Wednesday (Sep 16) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 20th Sep) | 5.5ft (1.7m) 10s |
| Best Surf | 7PM (Tue 22nd Sep) | 5ft (1.6m) 16s |
| Most Powerful | 1AM (Wed 23rd Sep) | 6.5ft (2.0m) 15s |
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 the next couple of weeks are serving up.
We’re looking at a pretty frustrating stretch ahead, if I’m being honest. The pattern kicks off with a solid pulse of swell, but the wind just won’t play ball. We’ve got a lot of size but very little quality for the first week or more. It’s one of those periods where you’ll be watching waves from the car park, shaking your head. There is a glimmer of hope further out, but we’ve got to earn it.
The only break on the menu here is St Agnes. It’s fairly exposed to the swell and likes a WSW direction.
We start on Wednesday the 16th of September. There’s a chunky 7ft groundswell from the W with a period of 11 seconds, and the wave energy is strong at 1047. But it’s blowing a 16 mph onshore wind from the NNW, and it’s just poor out there. Thursday the 17th is more of the same – 7ft from the WNW but with a fresh 19 mph cross-on shore. Lumpy, choppy, not worth the wetsuit peel.
Friday the 18th sees the swell ease a touch to between 6ft and 7ft, but that period jumps to 13 seconds – proper groundswell. The wave energy is very strong (1291). The morning is cross-shore and messy, but the afternoon cleans up with a cross-offshore breeze from the SW at 19 mph. It’s still only rated as marginal, but it’s the cleanest we’ve seen. For a die-hard local, you might get a few.
Saturday the 19th and Sunday the 20th are a write-off – similar swell but hammered by onshore and cross-onshore winds. By Monday the 21st, the swell drops to under 3ft and it’s too small to get excited about, even with offshore winds from the NE.
Now, hold onto your board. Things start looking a bit more interesting from Tuesday the 22nd of September. The wind goes cross-offshore from the ESE, and while the swell is small on the Tuesday morning at 3ft, the period is a very long 18 seconds! The afternoon jumps to 5ft from the W with that huge 16-second period, and the combined energy is very strong at 1561. This is clean, and it’s the best wave quality we’ll see for some time.
Wednesday the 23rd keeps that cross-offshore wind from the E at 16 mph, with 5ft from the WNW (13-second period, 943 moderate energy). Still clean, but the swell is a fraction smaller. After that, the wind stays good, but the swell drops away hard. From Thursday the 24th all the way through to Monday the 29th of September, we’re looking at tiny, weak surf – most days under 3ft and very low energy. The wind is clean (cross-offshore) but there’s just nothing with any punch. That’s nearly a week of flatness.
Then, right at the end of the window, on Tuesday the 29th of September, we get a proper pulse. The swell jumps to 8ft in the morning and a hefty 10ft in the afternoon from the WSW, but with a short 9 to 10-second period. The combined energy is very strong at 1746. This is big, and with 22 mph cross-offshore winds, it’s going to be powerful and clean. Now, 10ft is definitely for experts only. Beginners should stay well clear.
Wednesday the 30th sees it drop back to 6ft, still clean in the morning before the wind turns a bit cross in the afternoon. The last day, Thursday the 1st of October, is back to onshore chop and smaller swell.
The standout of the whole period? It’s a toss-up. For clean, long-period groundswell, Tuesday the 22nd of September morning and afternoon is your best bet for quality. For pure size and power, Tuesday the 29th of September afternoon is the one, but only if you’ve got the skills.
Water temps are at 64°, which is a touch warmer than normal for the time of year, so the rubber won't need to be too thick.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Very mild (max 18°C on Fri night, min 14°C on Wed morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Mon afternoon, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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 11 | W 11 | W 10 | WNW 8 | WNW 9 | WNW 11 | WNW 13 | W 12 | W 8 | W 8 | W 11 | W 10 | W 11 | W 11 | W 11 | WNW 12 | WNW 11 | WNW 10 | W 18 | W 16 | W 15 |
Wave Graph | |||||||||||||||||||||
1026 | 748 | 586 | 542 | 645 | 1111 | 1279 | 1083 | 478 | 398 | 813 | 633 | 441 | 396 | 286 | 224 | 156 | 147 | 427 | 1234 | 1763 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross | cross | cross-off | cross-on | cross-on | glassy | cross | cross-on | cross | cross-off | cross-off | cross-off |
High Tide | 9:08PM5.53m | 9:25AM5.34m | 9:45PM5.02m | 10:05AM4.86m | 10:31PM4.52m | 11:00AM4.42m | 11:41PM4.13m | 12:28PM4.15m | 1:29AM4.03m | 2:15PM4.26m | 2:57AM4.30m | 3:22PM4.66m | 3:49AM4.74m | ||||||||
Low Tide | 3:03PM0.97m | 3:19AM1.26m | 3:39PM1.43m | 3:56AM1.72m | 4:23PM1.89m | 4:45AM2.16m | 5:28PM2.29m | 6:06AM2.47m | 7:12PM2.45m | 7:56AM2.45m | 8:48PM2.23m | 9:14AM2.11m | 9:48PM1.81m | ||||||||
6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | |
— | 7:32 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:23 | — | — | 7:22 | — | — | 7:20 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 16 | 16 | 15 | 16 | 17 | 18 | 17 | 17 | 18 | 18 | 18 | 16 | 19 | 20 | 18 | 20 | 20 | 18 |
Feels °C | 12 | 11 | 12 | 10 | 10 | 9 | 12 | 12 | 15 | 14 | 15 | 18 | 17 | 17 | 17 | 19 | 20 | 19 | 17 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | W 11 | W 11 | N 5 | — | S 13 | S 13 | WNW 13 | S 17 | WNW 12 | WNW 11 | SW 15 | W 10 | W 11 | W 11 | W 11 | WNW 12 | WNW 11 | WNW 10 | W 12 | W 16 | W 15 |
1026 | 748 | 8 | — | 3 | 3 | 1279 | 6 | 158 | 206 | 9 | 633 | 441 | 396 | 286 | 224 | 156 | 147 | 353 | 1234 | 1763 | |
Swell 2 Height (m) Direction Period (s) | S 11 | N 5 | S 13 | — | — | — | SW 12 | S 15 | SW 16 | SW 16 | S 11 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | W 18 | W 12 | — |
2 | 19 | 4 | — | — | — | 6 | 4 | 10 | 10 | 2 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 427 | 327 | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | S 18 | S 18 | S 12 | SW 12 | — | — | — | — | — | — | — | — | SW 12 | — | — |
— | — | — | — | — | — | 6 | 6 | 3 | 5 | — | — | — | — | — | — | — | — | 6 | — | — | |
Wind waves Height (m) Direction Period (s) | N 5 | — | W 10 | WNW 8 | WNW 9 | WNW 11 | — | W 12 | W 8 | W 8 | W 11 | — | — | — | — | — | — | — | — | — | — |
19 | — | 586 | 542 | 645 | 1111 | — | 1083 | 478 | 398 | 813 | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 222 | 213 | 213 | 222 | 156 | 213 | 231 | 213 | 211 | 21 | 0 | 15 | 15 | 0 | 6 | 6 | 1 | 5 | 6 | 0 |
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.










