Surf Forecasts:
St Agnes surf forecast from 14 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 7AM (local time) - 5ft (1.6m), 7s period, W swell with 222 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 1.6m 7s and forecast to arrive on Tuesday (Aug 18) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Sunday (Aug 16) at 10AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Tue 18th Aug) | 5ft (1.6m) 7s |
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’s on the cards for St Agnes over the next couple of weeks.
Alright, I’ll be straight with you – the next ten days or so are looking pretty grim. We’ve got a long stretch of poor surf ahead, with only a glimmer of hope right at the very end of the forecast. From now until the 21st of August, it’s basically a write-off. The swell is small, the wind is mostly onshore or cross-onshore, and the waves are choppy and messy. There’s really nothing to get excited about until the 22nd of August.
On Saturday the 22nd, we finally get a bit of a break. It’s small, with a 1ft swell from the west, but the wind goes glassy in the morning. That’s a major positive – clean, glassy conditions even if the waves are tiny. The combined wave energy is weak (57), so it’s strictly a longboard or maybe a foamy kind of session. But hey, it’s surfable, and the peace and quiet will be nice.
After that, we’re back into a flat spell with some cross-off winds and rainy weather, but nothing with any size or power. The swell direction swings around from the south, but the heights are barely a ripple.
Now, hold on to your boards, because Thursday the 27th of August afternoon is where things get interesting. We’ve got an 8ft swell from the west-southwest, and the wind is light and cross-off from the south-southwest which will keep the faces clean. The combined wave energy is a strong 848, so there’s plenty of push. This is the standout of the whole period. The water temp is about 66°, which is a touch warmer than normal for this time of year, so you might not need the thickest wetsuit. The period is a short 8 seconds, so it’s a windswell, not a groundswell, but with that size and clean wind, St Agnes will be offering up some proper waves. This is one for the intermediate to experienced crew – 8ft is getting up there, and beginners might find it a bit much.
The following day, Friday the 28th, is a total monster, but it’s ruined by a screaming 25-28 mph cross-onshore wind. We’re talking 16ft to 18ft swell from the west with a long 13-second period, and the energy is a massive 8564 to 10182. That’s huge, powerful, and dangerous. The wind is just going to shred it into a mess. Unless you’re a tow-in expert or a kite surfer, this is a day to watch from the cliffs. Absolutely not for paddle surfing.
Overall, your best bet is that Thursday afternoon the 27th. It’s clean, it’s got size, and it’s the only real window of quality in the whole 16 days. The rest is a long, flat, or windblown wait.
Catch you in the water.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Fri morning, min 16°C on Sat afternoon). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Tue night. Warm (max 20°C on Mon morning, min 14°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 9 | W 9 | W 8 | W 8 | W 8 | W 8 | WNW 7 | W 7 | W 7 | W 9 | W 8 | W 6 | W 7 | WNW 7 | WNW 6 | WNW 6 | WNW 6 | WNW 7 | WNW 6 | W 8 | W 8 |
Wave Graph | |||||||||||||||||||||
129 | 123 | 165 | 100 | 95 | 55 | 18 | 26 | 12 | 40 | 138 | 153 | 206 | 175 | 200 | 181 | 181 | 181 | 108 | 74 | 48 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | on | on | cross-on | on | on | on |
High Tide | 7:13PM6.86m | 7:34AM6.51m | 7:53PM6.76m | 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 | ||||||||
Low Tide | 1:15PM0.01m | 1:40AM-0.08m | 1:54PM0.05m | 2:18AM0.07m | 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 | ||||||||
6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:16 | — | — | |
— | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | — | 8:32 | — | — | 8:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — |
Temp °C | 22 | 20 | 18 | 18 | 17 | 16 | 19 | 19 | 19 | 20 | 20 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 17 | 17 | 16 |
Feels °C | 22 | 19 | 17 | 13 | 13 | 12 | 17 | 17 | 19 | 18 | 18 | 18 | 14 | 14 | 15 | 13 | 13 | 16 | 13 | 12 | 12 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | WNW 7 | W 7 | W 7 | W 9 | SW 18 | SW 16 | SSW 17 | SW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | WNW 6 | W 8 | W 8 |
129 | 123 | 165 | 100 | 95 | 55 | 18 | 26 | 8 | 40 | 12 | 10 | 28 | 11 | 29 | 25 | 24 | 23 | 108 | 74 | 48 | |
Swell 2 Height (m) Direction Period (s) | S 13 | S 13 | SW 13 | — | — | SW 12 | NNE 4 | N 4 | — | SW 18 | — | S 19 | — | — | — | — | SSW 16 | SSW 15 | SSW 14 | SW 14 | SSW 14 |
3 | 3 | 7 | — | — | 6 | 6 | 1 | — | 12 | — | 7 | — | — | — | — | 24 | 22 | 21 | 33 | 19 | |
Swell 3 Height (m) Direction Period (s) | S 13 | S 13 | S 10 | — | — | S 20 | WSW 7 | SW 18 | SW 18 | — | — | — | — | — | — | — | — | — | — | SSW 14 | W 8 |
3 | 3 | 2 | — | — | 7 | 11 | 13 | 12 | — | — | — | — | — | — | — | — | — | — | 41 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | N 4 | N 4 | N 4 | — | — | WNW 4 | WNW 5 | W 8 | W 6 | W 7 | WNW 7 | WNW 6 | WNW 6 | WNW 6 | WNW 7 | N 5 | N 5 | N 4 |
— | — | — | 26 | 20 | 18 | — | — | 5 | 19 | 138 | 153 | 206 | 175 | 200 | 181 | 181 | 181 | 33 | 25 | 12 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 29 | 28 | 261 | 285 | 168 | 213 | 400 | 247 | 402 | 580 | 213 | 145 | 222 | 254 | 28 | 153 | 108 | 28 | 28 | 27 |
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.











