Surf Forecasts:
St Agnes surf forecast from 12 Aug 2026:
- Best quality surf: Thursday 13 Aug, 1AM (local time) - 3.5ft (1.0m), 9s period, W swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 5ft (1.6m), 9s period, WNW swell with 380 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 1AM (local time) - 3.5ft (1.0m), 9s 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 Thursday (Aug 13) at 1AM. The primary swell is predicted to be 1.0m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at St Agnes in the next 16 days are 1.6m 9s and forecast to arrive on Wednesday (Aug 19) at 7PM. 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 5s period and expected on Thursday (Aug 13) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 13th Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 1AM (Thu 13th Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 7PM (Wed 19th Aug) | 5ft (1.6m) 9s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, Rusty here again. Gotta be straight with you – this stretch for St Agnes is a bit of a heartbreaker. We’ve got a long, frustrating wait ahead with a whole lot of messy onshore wind and pretty average conditions. But there is a little light at the end of the tunnel, so hang in there.
The outlook starts now and runs all the way through the 16-day window. The first bit of surf that’s even worth talking about doesn't show up until Monday, August 24th. From now until then, it’s a long slog of close to two weeks of choppy, lumpy, or just plain poor conditions. The winds are a problem, mostly cross-on or onshore, and the swell isn’t clean enough to do anything with.
Let’s look at the rest. Through the end of August and into early September, the wind stays mostly cross-on from the west or northwest, with a fresh breeze. Swell heights bobble around from 2ft to 5ft, but the wave energy is weak to moderate at best, with a combined energy reading between 62 and 451. The real bummer is that it’s just not clean. A lot of the time the wave comment is "poor surf conditions" or "fresh cross-onshore and lumpy". There’s one half-decent window on Wednesday, August 19th, where we see a bit of WNW swell at 5ft with 9-second period and moderate energy (360), but it’s cross-on and choppy, so it’s still not a goer.
Now for the one true standout. Monday, August 24th is your date. This is the only real glimmer of hope in the whole run. We’ve got a solid 7ft swell rolling in from the west with an 8-second period, and the combined energy jumps right up to 532 to 544, which is strong and will have some punch. But the real magic is the wind. It’s a light breeze from the southeast – that’s offshore. The wave comment for both the morning and afternoon is "clean" and "expect good surf conditions". At St Agnes (Cornwall), that offshore wind will make the waves clean and lined up. The water is 66°F, about 4°F warmer than average for the time of year, so a touch warmer than you’d expect. This is the session to point for. The crowd at St Agnes is often there, so expect company for this one.
After that, it’s back to poor form from August 25th onward. The swell drops, the wind turns onshore again, and we’re looking at cross-on chop all over again. A few smaller pulses of swell come through on the 26th and 27th, but with fresh breezes and lumpy conditions, it’s not worth the drive.
So, to sum it up: a long, painful wait, but the morning of August 24th is your absolute best bet. Mark it on the calendar.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Wed afternoon, min 16°C on Fri night). Winds increasing (calm on Wed night, fresh winds from the N by Sat morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 20°C on Tue morning, min 15°C on Sun night). Winds decreasing (fresh winds from the N on Sat afternoon, light winds from the N by Sun night). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | N 5 | W 7 | WNW 7 | W 7 | W 8 | W 7 | W 7 | W 6 | W 6 |
Wave Graph | ||||||||||||||||||||
139 | 180 | 319 | 284 | 181 | 159 | 185 | 132 | 120 | 98 | 62 | 32 | 35 | 16 | 8 | 113 | 171 | 124 | 78 | 104 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | cross-on | on | cross-on | cross | cross | cross | cross |
High Tide | 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 | 9:28AM5.72m | 9:48PM5.59m | |||||||
Low Tide | 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 | 3:44PM0.99m | ||||||||
— | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — | |
8:45 | — | — | 8:44 | — | — | 8:43 | — | — | 8:40 | — | — | 8:38 | — | — | 8:37 | — | — | 8:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 28 | 22 | 21 | 22 | 19 | 20 | 20 | 17 | 17 | 17 | 16 | 18 | 18 | 16 | 18 | 19 | 18 | 20 | 21 | 19 |
Feels °C | 25 | 23 | 20 | 22 | 20 | 21 | 19 | 15 | 12 | 12 | 12 | 14 | 15 | 14 | 17 | 18 | 18 | 19 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | WNW 7 | W 7 | WNW 7 | W 7 | SW 18 | SW 16 | W 7 | SW 17 | SSW 17 |
139 | 180 | 319 | 284 | 181 | 159 | 185 | 132 | 120 | 98 | 55 | 16 | 35 | 16 | 8 | 12 | 10 | 124 | 11 | 29 | |
Swell 2 Height (m) Direction Period (s) | ESE 5 | ESE 5 | E 5 | E 4 | E 4 | S 13 | S 13 | SW 13 | — | — | SW 12 | WSW 8 | SW 18 | SW 18 | N 4 | — | S 19 | SSW 17 | — | — |
43 | 8 | 7 | 4 | 2 | 3 | 3 | 7 | — | — | 6 | 11 | 13 | 12 | 1 | — | 7 | 28 | — | — | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | S 11 | S 13 | — | S 10 | — | S 12 | S 20 | S 12 | S 18 | — | W 10 | — | — | — | — | — |
— | — | — | — | 2 | 3 | — | 2 | — | 3 | 7 | 3 | 7 | — | 8 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SE 3 | — | — | — | — | WNW 3 | — | N 4 | N 5 | N 5 | N 5 | N 5 | N 4 | N 4 | — | W 8 | W 7 | — | W 6 | W 6 |
6 | — | — | — | — | 1 | — | 11 | 50 | 35 | 62 | 32 | 9 | 4 | — | 113 | 171 | — | 78 | 104 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 23 | 222 | 15 | 15 | 44 | 28 | 286 | 265 | 28 | 249 | 27 | 381 | 400 | 21 | 15 | 15 | 285 | 247 |
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.











