Surf Forecasts:
St Agnes surf forecast from 11 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: Thursday 13 Aug, 7AM (local time) - 4ft (1.2m), 11s period, W swell with 332 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 1.2m 11s and forecast to arrive on Thursday (Aug 13) at 7AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 5s period and expected on Wednesday (Aug 12) at 1PM.
| 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 | 7AM (Thu 13th Aug) | 4ft (1.2m) 11s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, Rusty here. Let's look at what's brewing for our local stretch of coast over the next couple of weeks in old-school talk.
Straight up, it's a rough patch. We've got a massive run of days where the ocean's just not playing ball. Expect a pretty grim start from Tuesday the 11th all the way through to Thursday the 20th of August. That's over a week of onshore winds, choppy conditions, and tiny, weak swell. The wave energy is gonna be weak, sittin' down around 25 to 67 (combined energy), with only a brief spike to 180 on the Friday where the swell picks up but the wind's still messy. Honestly, it's a write-off. If you're into kites, you might find some fun in the stronger breezes, but for a surfboard, save your energy.
Finally, things start to look up on Friday the 21st of August. That's our one true standout. We're lookin' at a clean session with a light breeze and cross-offshore wind from the ESE in the morning, switchin' to SE in the afternoon. The swell fills in nicely – around 6.2 ft for the morning and bumpin' up to 7.5 ft in the afternoon from the WNW. The wave energy ramps up strong, with readings of 432 and then 692 (combined energy). That's proper energy. The wind will be light, makin' for some glassy conditions. Heads up, though – at 7.5 ft, this is gettin' into bigger territory, so you'll want to be comfortable.
St Agnes is the spot here. This is a fairly exposed break that likes a WSW swell, and we're gettin' a solid WNW push. It'll be a bit of a battle with the direction, but with that much power and clean conditions, it'll still fire. Expect good crowds here, but for this kind of quality, it's worth it.
After that, we slide back into mediocrity. Saturday the 22nd has another lump of swell, around 6.6 ft and 5.6 ft from the WNW, but a moderate cross-shore wind messes it up again. The energy's still there (463 to 511 combined energy), but the wind just kills the quality. Then Sunday through Tuesday is back to small, choppy, or even rainy. It's a one-day window, folks, so if you can, make Friday the 21st your day.
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 16°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 19°C on Thu night, min 16°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 8 | W 13 | W 11 | W 10 | W 9 | W 10 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 | W 8 | WNW 8 | W 8 | WNW 7 | W 7 | N 4 | N 5 | WNW 9 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 19 | 12 | 85 | 125 | 139 | 184 | 319 | 284 | 220 | 126 | 205 | 136 | 124 | 96 | 55 | 17 | 16 | 12 | 21 | 28 | 63 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off |
High Tide | 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 | 8:13AM6.37m | 8:31PM6.49m | 8:51AM6.09m | 9:09PM6.08m | |||||||
Low Tide | 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 | 2:31PM0.25m | 2:54AM0.38m | 3:07PM0.57m | 3:29AM0.78m | |||||||
 | |  | | | | |  |  | | | | | | |  | | | | | | |
 | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | 8:47 | — | — | 8:45 | — | — | 8:44 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 20 | 25 | 26 | 20 | 21 | 22 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 17 | 17 | 15 | 20 | 20 | 19 |
Feels °C | 20 | 20 | 18 | 23 | 24 | 19 | 20 | 22 | 19 | 18 | 15 | 15 | 14 | 13 | 13 | 13 | 12 | 9 | 14 | 14 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 7 | W 11 | W 10 | W 9 | W 10 | W 11 | W 10 | W 10 | W 9 | W 8 | W 8 | W 8 | WNW 8 | W 8 | WNW 7 | W 7 | W 7 | W 7 | N 4 | W 8 |
| kJ | 19 | 11 | 85 | 125 | 139 | 184 | 319 | 284 | 220 | 126 | 205 | 136 | 124 | 96 | 55 | 17 | 16 | 9 | 8 | 10 | 63 |
Swell 2 Height (m) Direction Period (s) | SW 6 | W 9 | WNW 7 | ESE 5 | ESE 5 | E 5 | ENE 5 | E 6 | E 5 | S 13 | S 13 | N 4 | — | — | SW 12 | WSW 8 | WNW 5 | W 7 | W 10 | WNW 9 | N 4 |
| kJ | 6 | 7 | 10 | 2 | 3 | 8 | 9 | 6 | 2 | 3 | 3 | 6 | — | — | 6 | 11 | 5 | 1 | 2 | 28 | 3 |
Swell 3 Height (m) Direction Period (s) | N 4 | W 13 | SW 6 | SW 6 | — | — | — | S 11 | S 11 | — | — | SW 13 | — | — | S 20 | N 4 | SW 18 | SW 18 | SW 18 | W 7 | SE 5 |
| kJ | 1 | 12 | 1 | 1 | — | — | — | 2 | 2 | — | — | 7 | — | — | 7 | 2 | 13 | 12 | 12 | 4 | 1 |
Wind waves Height (m) Direction Period (s) | SE 2 | SE 3 | SE 5 | E 5 | — | — | NNW 2 | — | — | WNW 5 | — | NNW 4 | N 5 | N 5 | N 4 | NNE 4 | N 4 | N 4 | N 5 | — | — |
| kJ | 1 | 3 | 6 | 17 | — | — | 1 | — | — | 51 | — | 6 | 31 | 16 | 12 | 4 | 2 | 10 | 21 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 385 | 223 | 0 | 6 | 27 | 22 | 23 | 213 | 15 | 29 | 28 | 28 | 81 | 28 | 261 | 392 | 265 | 384 | 342 | 27 | 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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