
Surf Forecasts:
St Agnes surf forecast from 9 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period, W swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 4AM (local time) - 6ft (1.8m), 7s period, NNW swell with 355 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s 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 Tuesday (Aug 11) at 10PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.3m and 7s. 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 1.8m 7s and forecast to arrive on Sunday (Aug 16) at 4AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 7s period and expected on Sunday (Aug 16) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 11th Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 10PM (Tue 11th Aug) | 1.5ft (0.5m) 11s |
| Most Powerful | 4AM (Sun 16th Aug) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, let’s get real about the surf ahead. I’ve been staring at the charts for St Agnes and, to be honest, it’s a bit of a flat, frustrating stretch for the next couple of weeks. There’s no real swell to get excited about, and the wind is mostly going to be messing with what little we get. It’s one of those times where you’re better off checking the sandbars on a longboard or just waiting for the next pulse.
The first couple of days, Sunday the 9th and Monday the 10th, are a write-off. We’ve got tiny waves around 1ft to 2ft, with a weak, choppy look to them. The winds are mostly cross-onshore, so it’s going to be a mess. Not worth paddling out for anything but a quick splash.
Tuesday the 11th has a slight improvement in that the wind goes cross-offshore, cleaning things up, but the swell just isn’t there. You’re looking at 1ft dropping to 0.7ft by the afternoon. It’s clean, but there’s nothing to ride. That’s a hard pass from me.
Wednesday the 12th is the first day that might get you out of the car. Still small, but the swell bumps up to 3ft and 3ft, and the energy is starting to show (132 and 139 combined energy). Morning looks like the better bet with a gentle east breeze, clean conditions. The afternoon has a light cross-shore, but it could still be fun on a high-volume board. It’s not going to be epic, but it’s something.
Then we go back into the doldrums. Thursday the 13th sees a pulse of swell at 4ft with a decent 11-second period out of the west, and the energy is up (281), but the wind is blowing straight onshore. It’s going to be lumpy and uninviting. That northerly wind is a killer for St Agnes. Friday the 14th is more of the same, just a bit smaller. The weekend, the 15th and 16th, gets blown out with fresh cross-onshore winds and messy, short-period waves. Not your friend.
The following week starts flat as a pancake. Monday the 17th and Tuesday the 18th are basically nothing, with waves under 0.7ft. There’s a long-period swell showing on Tuesday the 18th (17-seconds from the southwest), but it’s tiny at 0.3ft. That’s a tease, not a wave.
We get a little hiccup of energy on Wednesday the 19th, with 2ft to 3ft, and the wind is light. It might be rideable, but it’s still poor. The energy is only moderate (105). Thursday the 20th sees a bit more size, around 2ft, but the wind goes onshore again. The pattern is just not giving us much to work with.
The only real standout in this whole grim outlook is Sunday the 23rd and Monday the 24th. The swell builds: Sunday sees 5ft by the afternoon, and Monday morning pushes to 6ft with a solid 491 combined energy. That’s the most significant swell of the whole window. The catch? The period is short, around 7 seconds, and the wind is still cross-onshore or onshore. It’s going to be a bit of a mess, but there will be power. For more experienced surfers, it might be the only day worth looking at, but it’s not going to be clean. The water’s still warm, a touch warmer than usual for this time of year, which is about the only thing that’s normal.
So, honestly, for the next 16 days, there’s no day I’d call a must-surf. The best bet is Wednesday the 12th for a clean, small session, and maybe that Sunday the 23rd/Monday the 24th pulse for the bigger, messier stuff. But don’t get your hopes up. The forecast can change, but right now, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Tue morning, min 16°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Wed morning, min 17°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 | WNW 9 | NW 5 | WNW 8 | W 8 | WNW 8 | W 13 | W 11 | W 10 | W 9 | W 9 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 7 | W 7 |
Wave Graph | |||||||||||||||||||||
26 | 25 | 26 | 28 | 22 | 33 | 19 | 13 | 116 | 125 | 139 | 173 | 279 | 239 | 183 | 129 | 95 | 132 | 89 | 87 | 39 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross-on | on | on | on | on | on | on | cross-on | cross-on | on |
High Tide | 2:49PM5.12m | 3:28AM5.21m | 4:00PM5.54m | 4:32AM5.62m | 4:57PM6.03m | 5:25AM6.02m | 5:47PM6.47m | 6:11AM6.33m | 6:31PM6.76m | 6:54AM6.50m | 7:13PM6.86m | 7:34AM6.51m | 7:53PM6.76m | ||||||||
Low Tide | 9:25PM1.41m | 9:58AM1.29m | 10:34PM0.96m | 10:59AM0.85m | 11:30PM0.50m | 11:49AM0.44m | 00:17AM0.14m | 12:34PM0.15m | 1:00AM-0.06m | 1:15PM0.01m | 1:40AM-0.08m | 1:54PM0.05m | 2:18AM0.07m | ||||||||
5:58 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 8:52 | — | — | 8:50 | — | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:43 | — | — | 8:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — |
Temp °C | 20 | 20 | 17 | 17 | 18 | 18 | 23 | 23 | 21 | 25 | 25 | 21 | 22 | 21 | 19 | 21 | 20 | 18 | 18 | 17 | 16 |
Feels °C | 19 | 18 | 15 | 15 | 15 | 16 | 19 | 18 | 18 | 23 | 24 | 20 | 20 | 19 | 19 | 21 | 19 | 17 | 13 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | NW 5 | WNW 5 | W 8 | WNW 8 | WNW 7 | W 11 | W 10 | W 9 | W 9 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 7 | W 7 |
26 | 25 | 26 | 28 | 10 | 33 | 19 | 11 | 116 | 125 | 139 | 173 | 279 | 239 | 183 | 129 | 95 | 132 | 89 | 87 | 39 | |
Swell 2 Height (m) Direction Period (s) | WSW 6 | WSW 6 | SW 7 | SW 6 | WNW 8 | N 4 | N 4 | W 9 | SW 6 | SW 6 | SE 6 | ESE 4 | E 5 | E 5 | E 5 | S 13 | S 13 | S 13 | WSW 8 | S 12 | SW 12 |
4 | 4 | 16 | 14 | 22 | 9 | 1 | 7 | 1 | 1 | 8 | 1 | 13 | 9 | 2 | 3 | 3 | 3 | 21 | 3 | 6 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | SW 12 | WNW 8 | SW 6 | SW 6 | SW 6 | W 13 | SW 12 | SW 12 | — | — | S 11 | — | S 11 | S 13 | S 13 | S 13 | — | — | S 20 |
6 | 6 | 6 | 24 | 15 | 7 | 6 | 13 | 6 | 6 | — | — | 2 | — | 2 | 3 | 3 | 3 | — | — | 7 | |
Wind waves Height (m) Direction Period (s) | — | — | WNW 4 | — | N 4 | — | SE 3 | SE 3 | SE 6 | ESE 6 | E 6 | — | E 5 | NNW 3 | NNW 3 | NW 3 | WNW 3 | — | — | N 6 | N 7 |
— | — | 16 | — | 9 | — | 2 | 5 | 8 | 6 | 78 | — | 2 | 1 | 1 | 2 | 1 | — | — | 73 | 278 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 400 | 222 | 222 | 27 | 28 | 27 | 400 | 223 | 0 | 0 | 1 | 22 | 28 | 28 | 27 | 28 | 213 | 28 | 79 | 261 | 255 |
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.











