
Surf Forecasts:
St Agnes surf forecast from 14 Sep 2026:
- Best quality surf: Monday 21 Sep, 1AM (local time) - 4.5ft (1.4m), 14s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 7AM (local time) - 7.5ft (2.3m), 13s period, WNW swell with 1,723 kJ wave energy.
- Next surfable swell (1★+): Monday 21 Sep, 1AM (local time) - 4.5ft (1.4m), 14s period with WNW 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 Monday (Sep 21) at 1AM. The primary swell is predicted to be 1.4m and 14s period. 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 2.3m 13s and forecast to arrive on Friday (Sep 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 0.8m 6s period and expected on Wednesday (Sep 16) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Mon 21st Sep) | 4.5ft (1.4m) 14s |
| Best Surf | 1AM (Mon 21st Sep) | 4.5ft (1.4m) 14s |
| Most Powerful | 7AM (Fri 18th Sep) | 7.5ft (2.3m) 13s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright, Rusty here. Let's be straight about it—this stretch for St. Agnes isn't exactly lighting up the forecast. We've got a long gap of poor conditions to start, with the first glimmer of something surfable not showing up until Friday the 18th, and even that is marginal. The first ten or so days are mostly a write-off with rubbish wind, lumpy onshore slop, and energy that's not doing us any favours. Hold your horses.
Monday 14th kicks off with a messy 4 ft W swell (236 combined energy) under a cloudy sky and a cross-off breeze. It's clean but still considered poor surf conditions. Tuesday the 15th gets worse: a 6 ft to 7 ft W swell, but crippled by a 30 km/h cross-onshore wind that's turning it into a fresh, lumpy mess (411 to 524 combined energy). Wednesday the 16th brings the biggest swell of the early week, a 7 ft WNW at 11 seconds (1005 combined energy), but with a howling onshore wind, it's a no-go.
Friday 18th finally offers a sniff. We've got a 7 ft W long-period groundswell (13 seconds) packing a strong 1623 combined energy. The wind is cross, not ideal, but there's a chance it cleans up. This is marginal, questionable tide stuff, not a standout. The morning is slightly better than the afternoon when the wind goes cross-off.
The weekend from the 19th to the 20th is more of the same—mid-range swell with cross-shore chop. Sunday the 20th afternoon sees a 5 ft WNW that's long-period again (15 seconds, 1071 combined energy), but with a cross wind, it's still a marginal call. Short-period (7-8 second) windswell on Saturday keeps the energy weak and the waves crumbly.
Now, Monday 21st is where we get our first proper recommendation. Expect good surf conditions with a 3 ft WNW groundswell (13 seconds) and light cross-off winds. The combined energy is 368, and the light breeze will keep it clean. This is the one that's worth a paddle. The following days are mostly poor again, with small swell and onshore winds, until Thursday 24th afternoon.
That Thursday afternoon is a real gem: a 3 ft WNW swell with an 18-second period (491 combined energy) and a clean cross-off breeze. That's a very long-period groundswell—great for a point or reef, but at a beach break like St Agnes, those long intervals might make it break a bit straight. Still, with light wind and clean conditions, it's a standout for the second week.
Friday 25th is a mixed bag. The morning offers a 6 ft WNW with 14-second period (1144 combined energy) and clean cross-off wind, but the score is marginal. The wind is a fresh 30 km/h, which might keep the surface clean but is strong.
Sunday 27th is the big one, but it's a warning. A massive 12 ft WSW groundswell with 11-second period and glassy offshore wind—sound perfect, right? The combined energy is a huge 3227, but the warning is clear: it's too big for this break. This is expert-only territory, and even then, it might be unsurfable due to the size. The morning has a gentle offshore, the afternoon goes glassy, but unless you're a seasoned charger, give it a miss. The water temperature is about average for the time of year, nothing out of the ordinary.
Monday 28th morning offers a reprieve: a 4 ft WSW swell with glassy conditions (571 combined energy) and a slight air. This is a good, clean option if you want a manageable wave after the weekend's juice.
Overall, the first week is a bust. The standouts are Monday 21st for a clean, small-wave session, and Thursday 24th afternoon for the clean, super-long period groundswell. Friday 25th morning is worth a look if the wind doesn't blow you off. The 27th is a monster swell best left to the experts. Keep an eye on the forecasts, as things can change.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 20°C on Mon morning, min 14°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Wed night. Very mild (max 17°C on Fri afternoon, min 15°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 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 | WSW 6 | W 8 | W 8 | WNW 9 | WNW 11 | WNW 11 | W 10 | W 8 | W 8 | WNW 8 | WNW 13 | W 13 | W 8 | W 7 | W 8 | W 10 | W 10 | WNW 15 | WNW 14 |
Wave Graph | |||||||||||||||||||||
230 | 181 | 123 | 407 | 522 | 1001 | 954 | 698 | 530 | 566 | 576 | 762 | 1605 | 1314 | 367 | 348 | 378 | 745 | 426 | 1063 | 701 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-on | cross-on | on | on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross-off | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 7:41AM6.44m | 7:59PM6.41m | 8:15AM6.17m | 8:33PM6.00m | 8:49AM5.79m | 9:08PM5.53m | 9:25AM5.34m | 9:45PM5.02m | 10:05AM4.86m | 10:31PM4.52m | 11:00AM4.42m | 11:41PM4.13m | 12:28PM4.15m | 1:29AM4.03m | |||||||
Low Tide | 1:58PM0.25m | 2:16AM0.43m | 2:30PM0.57m | 2:47AM0.82m | 3:03PM0.97m | 3:19AM1.26m | 3:39PM1.43m | 3:56AM1.72m | 4:23PM1.89m | 4:45AM2.16m | 5:28PM2.29m | 6:06AM2.47m | 7:12PM2.45m | ||||||||
6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | |
— | 7:37 | — | — | 7:36 | — | — | 7:32 | — | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:23 | — | |
mm | — | — | 1 | — | — | — | — | — | 1 | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — |
Temp °C | 20 | 20 | 18 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 16 | 15 | 16 | 17 | 17 | 17 | 17 | 17 | 19 | 19 | 18 |
Feels °C | 19 | 18 | 16 | 11 | 10 | 12 | 11 | 11 | 12 | 10 | 10 | 9 | 12 | 13 | 14 | 15 | 15 | 16 | 18 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | W 9 | SW 12 | W 8 | S 11 | S 11 | — | WNW 11 | WNW 11 | N 6 | N 6 | S 13 | S 13 | SW 12 | S 17 | WNW 12 | WNW 11 | WNW 10 | W 10 | W 10 | WNW 15 | WNW 14 |
230 | 6 | 22 | 2 | 2 | — | 954 | 698 | 10 | 1 | 3 | 3 | 6 | 6 | 164 | 123 | 155 | 745 | 426 | 1063 | 701 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | W 14 | WNW 12 | S 11 | — | — | S 11 | N 6 | S 13 | — | — | — | S 18 | S 12 | SW 16 | SW 16 | SW 15 | SW 14 | N 5 | N 5 | N 5 |
6 | 4 | 27 | 2 | — | — | 2 | 29 | 4 | — | — | — | 6 | 3 | 10 | 10 | 9 | 8 | 11 | 7 | 4 | |
Swell 3 Height (m) Direction Period (s) | — | W 14 | SW 12 | — | — | — | — | — | — | — | — | — | S 18 | — | S 12 | S 12 | — | — | WNW 16 | SW 14 | SW 13 |
— | 4 | 6 | — | — | — | — | — | — | — | — | — | 6 | — | 3 | 3 | — | — | 149 | 8 | 7 | |
Wind waves Height (m) Direction Period (s) | — | W 9 | WSW 6 | W 8 | W 8 | WNW 9 | N 6 | — | W 10 | W 8 | W 8 | WNW 8 | WNW 13 | W 13 | W 8 | W 7 | W 8 | — | — | — | — |
— | 181 | 123 | 407 | 522 | 1001 | 49 | — | 530 | 566 | 576 | 762 | 1605 | 1314 | 367 | 348 | 378 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 15 | 15 | 222 | 222 | 103 | 56 | 103 | 506 | 555 | 222 | 103 | 231 | 213 | 231 | 231 | 198 | 15 | 29 | 148 | 0 |
Best forecast wave conditions in North Cornwall | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










