Surf Forecasts:
St Agnes surf forecast from 16 Aug 2026:
- Most powerful swell: Thursday 20 Aug, 1AM (local time) - 7ft (2.2m), 8s period, WNW swell with 542 kJ wave energy.
Best Forecast Surf Conditions for St Agnes this week:
The most powerful waves expected at St Agnes in the next 16 days are 2.2m 8s and forecast to arrive on Thursday (Aug 20) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Saturday (Aug 22) at 4PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Thu 20th Aug) | 7ft (2.2m) 8s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, let’s get this sorted. The next couple of weeks are looking pretty grim for any proper surf around St Agnes. There’s very little on the table for a good long while, and I’m not going to sugarcoat it – the ocean’s gonna be a bit of a mess.
We’re looking at a big gap in any real surf, with nothing worth paddling out for from Sunday the 16th all the way through to Thursday the 27th. That’s a solid stretch of small, wind-blown, and just plain ugly conditions. The swell is tiny, the wind’s mostly onshore or cross, and the energy in the water is weak. You’ll see readings like 42 and 41 on the 16th, and it hardly gets better. We’ve got some Westerly swells at 1ft to 3ft, but they’re short-period, 8 seconds or less a lot of the time, which just means messy, gutless waves. The wind will chop it up, and it’ll be a struggle for even a longboard.
Even when the swell bumps up a bit around the 18th and 19th, with a bit more energy (195, 204, 236), the wind is blowing cross-onshore at 15 to 18 mph, just ruining any chance of a clean face. It’s all poor surf conditions, trust me on that.
Things stay pretty average right through the next week. On Monday the 24th, we’ve got a strong breeze from the NE at 25 mph making it totally unpleasant, with some size but not an ounce of shape. That’s a write-off. There’s a small moment of hope on Thursday the 27th when the wind finally swings offshore, and we get a little 3ft westerly swell with some decent energy (91) showing up. That’s the first time in what feels like forever we get clean conditions, but it’s barely surfable – a real "if you’re desperate" kind of session.
But then things finally turn on Friday the 28th. Mark that one in the calendar. That’s the standout of the whole run. The swell jumps to a proper 8ft from the West with a period of 10 seconds, and the combined energy is a healthy 1048. That’s a real pulse of swell. The wind is light and cross-offshore from the SSW, and it’s looking clean. That’s the day to get wet. St Agnes is fairly consistent, so it should hold this swell, and the WSW direction is right in its wheelhouse. This is your window. It’s not going to be for the faint-hearted – 8ft is a solid step up, and it’ll be a bit too much for the groms, but for the rest of us, it’s game on.
The afternoon sees that drop back to 5ft, which is still really good, but the morning is definitely the best of it. After that, Saturday the 29th still has some waves, but the energy drops right back off, and it’s looking pretty average again. So, to be clear: the first 11 days are a total drought, and Friday the 28th is the one true gem. Don’t waste it.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Mon morning, min 15°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Tue night. Very mild (max 18°C on Wed morning, min 15°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 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) | WNW 7 | W 7 | W 7 | W 9 | W 8 | W 7 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 8 | WNW 7 | WNW 9 | W 9 | W 9 | W 8 | SW 16 | W 8 | W 10 | N 6 |
Wave Graph | |||||||||||||||||||||
16 | 25 | 12 | 39 | 118 | 94 | 139 | 115 | 143 | 121 | 212 | 542 | 254 | 318 | 181 | 101 | 71 | 39 | 21 | 48 | 94 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross |
High Tide | 8:13AM6.37m | 8:31PM6.49m | 8:51AM6.09m | 9:09PM6.08m | 9:28AM5.72m | 9:48PM5.59m | 10:08AM5.28m | 10:29PM5.07m | 10:52AM4.83m | 11:20PM4.59m | 11:51AM4.44m | 00:32AM4.24m | 1:16PM4.23m | 2:06AM4.17m | |||||||
Low Tide | 2:31PM0.25m | 2:54AM0.38m | 3:07PM0.57m | 3:29AM0.78m | 3:44PM0.99m | 4:05AM1.23m | 4:23PM1.44m | 4:45AM1.69m | 5:10PM1.88m | 5:37AM2.10m | 6:16PM2.23m | 6:55AM2.37m | 7:50PM2.36m | ||||||||
6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | |
— | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | |
mm | — | — | — | — | — | — | — | — | 2 | 2 | — | 1 | — | — | — | 1 | — | — | — | 4 | 1 |
Temp °C | 17 | 17 | 19 | 20 | 19 | 19 | 19 | 18 | 17 | 18 | 18 | 17 | 17 | 18 | 17 | 16 | 16 | 15 | 16 | 17 | 13 |
Feels °C | 14 | 15 | 18 | 18 | 17 | 17 | 16 | 15 | 14 | 14 | 12 | 12 | 12 | 14 | 14 | 12 | 12 | 11 | 12 | 13 | 8 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | W 7 | W 7 | W 9 | SW 18 | SW 16 | SSW 17 | SW 17 | SSW 17 | WNW 9 | SSW 16 | SSW 15 | WNW 7 | WNW 9 | W 9 | W 9 | W 8 | W 8 | N 4 | N 6 | W 10 |
16 | 25 | 8 | 39 | 12 | 10 | 28 | 11 | 29 | 47 | 24 | 23 | 254 | 318 | 181 | 101 | 71 | 35 | 5 | 22 | 30 | |
Swell 2 Height (m) Direction Period (s) | WSW 8 | SW 18 | N 3 | SW 18 | — | SW 16 | SSW 17 | — | — | WNW 11 | — | — | WNW 9 | SW 14 | SSW 14 | N 4 | SSW 13 | SW 16 | W 8 | W 10 | SE 6 |
11 | 13 | 1 | 12 | — | 10 | 28 | — | — | 12 | — | — | 138 | 33 | 19 | 6 | 17 | 39 | 21 | 48 | 11 | |
Swell 3 Height (m) Direction Period (s) | S 12 | — | SW 18 | — | — | — | — | — | — | SSW 16 | — | — | SSW 14 | — | — | SSW 13 | SSW 16 | W 11 | W 10 | SE 6 | SW 15 |
3 | — | 12 | — | — | — | — | — | — | 24 | — | — | 21 | — | — | 17 | 25 | 9 | 18 | 10 | 54 | |
Wind waves Height (m) Direction Period (s) | N 4 | N 4 | WNW 4 | WNW 5 | W 8 | W 7 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 8 | — | N 5 | N 5 | — | N 5 | N 4 | ENE 2 | E 6 | N 6 |
12 | 3 | 4 | 37 | 118 | 94 | 139 | 115 | 143 | 121 | 212 | 542 | — | 16 | 16 | — | 21 | 13 | 1 | 182 | 94 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 247 | 311 | 243 | 279 | 213 | 285 | 279 | 213 | 213 | 222 | 265 | 222 | 222 | 211 | 81 | 28 | 28 | 28 | 44 | 24 | 148 |
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.











