Surf Forecasts:
St Agnes surf forecast from 20 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 10PM (local time) - 4.5ft (1.3m), 8s period, SSW swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 4PM (local time) - 7ft (2.1m), 9s period, WNW swell with 721 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 10AM (local time) - 2ft (0.6m), 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 Saturday (Aug 22) at 10AM. The primary swell is predicted to be 0.6m and 10s 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 2.1m 9s and forecast to arrive on Thursday (Aug 20) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 6s period and expected on Saturday (Aug 22) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 22nd Aug) | 2ft (0.6m) 10s |
| Best Surf | 10PM (Wed 26th Aug) | 4.5ft (1.3m) 8s |
| Most Powerful | 4PM (Thu 20th Aug) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, let’s talk St Agnes. Over the next couple weeks, we got some heavy hitters coming in, but the wind is gonna be a real pain for most of it. Don’t get your hopes up too early.
Thursday the 20th and Friday the 21st are a total washout. We’ve got a fresh cross-onshore breeze making a 8ft to 3ft WNW swell a choppy, lumpy mess. Not worth your time. Saturday the 22nd drops down to a tiny 2ft from the W, but the wind goes light and clean for the morning. It’s small, but if you’re jonesing, it’s rideable. The energy is real weak (88). That’s our first real shot, and it’s not much. From Sunday the 23rd all the way to Tuesday the 25th, the swell bottoms out – we’re talking 1ft to 2ft with light to fresh cross-offshore winds keeping it glassy, but there’s no power. The combined energy is a whisper (37 to 74). A long, boring gap of tiny waves.
Now, Wednesday the 26th is a flicker. Swell picks up to 5ft from the SSW with a short period (7 secs), but the big news is a fresh offshore wind from the SSE. It’s marked as marginal, but a clean 5ft wave with offshore breeze could give you a few fun ones if the tide is right. Not a standout, but it’s action.
The real standout is Thursday the 27th. Morning and afternoon we’ve got clean 3ft to 4ft W swell (10 sec period) with light to gentle cross-offshore winds from the SW. The combined energy climbs to a solid 292. This is the best in the whole forecast: clean conditions, a nice rolling groundswell, and not too big. This is your day.
Friday the 28th gets ugly again. Jumps to 6ft from the W, but the wind swings cross-onshore and it gets choppy. That clean spell is gone.
Then the big stuff. Saturday the 29th and Sunday the 30th see a massive pulse – we’re talking 10ft to 13ft from the WSW and W. The combined energy is massive (1302 to 2730). For the morning of the 29th, it’s clean with cross-offshore wind, but the swell is reported as *too big* for St Agnes. Experts only. The afternoon of the 29th and the morning of the 30th have a cross-shore wind and the swell is still massive. This setup is more for a kite surfer than a paddle surfer. For everyone else, it’s a look-don’t-touch deal.
Monday the 31st drops back to 4ft from the W with a risk of thunderstorms and a clean cross-offshore wind, but the energy is low (177). From Tuesday 1st to Friday 4th of September, we get another run of big, messy swell (8ft to 10ft) with strong cross-onshore winds. Lumpy, choppy, and unappealing.
The best of the whole lot is clean and fun on Thursday the 27th. Don’t sleep on that one.
- Rusty
Short Range ForecastLight rain (total 3mm), mostly falling on Fri morning. Very mild (max 18°C on Sat morning, min 14°C on Fri morning). Winds decreasing (fresh winds from the WNW on Thu morning, light winds from the NE by Fri night). | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Tue night. Warm (max 23°C on Tue morning, min 16°C on Sun night). Winds increasing (light winds from the NE on Sun morning, fresh winds from the E by Mon afternoon). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | WNW 9 | WNW 9 | W 10 | W 8 | WNW 8 | W 9 | W 10 | W 9 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SSW 13 | WNW 10 | W 9 | SSW 8 | SSW 7 | SSW 7 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 791 | 721 | 361 | 169 | 112 | 53 | 67 | 25 | 54 | 51 | 51 | 52 | 31 | 28 | 17 | 33 | 43 | 81 | 218 | 181 | 184 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | on | cross-on | cross-off | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off |
High Tide | 10:52AM4.83m | 11:20PM4.59m | 11:51AM4.44m | 00:32AM4.24m | 1:16PM4.23m | 2:06AM4.17m | 2:47PM4.35m | 3:25AM4.40m | 3:52PM4.70m | 4:18AM4.77m | 4:39PM5.13m | 4:59AM5.18m | 5:16PM5.57m | ||||||||
Low Tide | 5:10PM1.88m | 5:37AM2.10m | 6:16PM2.23m | 6:55AM2.37m | 7:50PM2.36m | 8:32AM2.35m | 9:20PM2.18m | 9:47AM2.05m | 10:19PM1.81m | 10:37AM1.64m | 11:02PM1.39m | 11:16AM1.23m | 11:39PM0.98m | ||||||||
 |  |  |  | | | | | | | |  |  | | | | |  | | |  | |
 | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | — | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | 2 |
Temp °C | 17 | 17 | 15 | 15 | 15 | 15 | 18 | 18 | 17 | 19 | 20 | 18 | 20 | 20 | 20 | 23 | 22 | 18 | 19 | 21 | 17 |
Feels °C | 11 | 12 | 12 | 11 | 10 | 13 | 15 | 15 | 14 | 16 | 17 | 15 | 13 | 12 | 14 | 19 | 20 | 18 | 14 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | WNW 9 | W 10 | W 8 | WNW 8 | N 5 | N 6 | N 6 | N 5 | N 4 | SW 14 | SW 9 | N 4 | SW 13 | SE 6 | WNW 10 | W 9 | W 9 | SSW 7 | SSW 7 | SSW 8 |
| kJ | 21 | 721 | 361 | 169 | 112 | 19 | 30 | 30 | 10 | 5 | 51 | 21 | 3 | 28 | 14 | 33 | 43 | 57 | 218 | 181 | 172 |
Swell 2 Height (m) Direction Period (s) | — | SW 14 | SSW 14 | SSW 13 | SSW 13 | W 9 | W 10 | W 9 | W 9 | SW 14 | WSW 10 | SW 14 | SW 14 | W 9 | NNE 5 | SW 8 | SW 8 | SW 13 | W 8 | W 8 | W 11 |
| kJ | — | 33 | 19 | 17 | 17 | 53 | 67 | 25 | 14 | 51 | 18 | 52 | 31 | 6 | 5 | 10 | 14 | 6 | 50 | 63 | 184 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SSW 16 | SSW 16 | WNW 8 | SSW 15 | WNW 6 | SW 15 | W 9 | SE 5 | SE 5 | WSW 9 | SW 8 | SSW 13 | N 4 | SSW 13 | SSW 13 | SW 12 | SW 12 | E 5 |
| kJ | — | — | — | 25 | 25 | 11 | 21 | 12 | 54 | 6 | 4 | 4 | 8 | 3 | 17 | 1 | 17 | 16 | 6 | 6 | 1 |
Wind waves Height (m) Direction Period (s) | WNW 9 | — | N 5 | N 5 | N 5 | — | — | E 3 | NE 5 | E 5 | N 4 | NNE 4 | ESE 4 | E 7 | — | SW 5 | — | SSW 8 | — | — | — |
| kJ | 791 | — | 17 | 55 | 37 | — | — | 1 | 22 | 18 | 3 | 4 | 13 | 56 | — | 1 | — | 81 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 155 | 555 | 27 | 28 | 81 | 27 | 0 | 5 | 27 | 27 | 27 | 5 | 399 | 392 | 384 | 194 | 0 | 0 | 194 | 63 | 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.
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