Surf Forecasts:
St Agnes surf forecast from 4 Sep 2026:
- Best quality surf: Saturday 5 Sep, 7PM (local time) - 4ft (1.2m), 11s period, W swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 10AM (local time) - 8ft (2.5m), 13s period, W swell with 2,074 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7PM (local time) - 4ft (1.2m), 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 Saturday (Sep 05) at 7PM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.2m and 13s. 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 2.5m 13s and forecast to arrive on Monday (Sep 07) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Monday (Sep 07) at 1AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Sat 5th Sep) | 4ft (1.2m) 11s |
| Best Surf | 7PM (Sat 5th Sep) | 4ft (1.2m) 11s |
| Most Powerful | 10AM (Mon 7th Sep) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for this stretch of coast. I’ll be honest with you, this isn’t a week to be getting excited about. We’ve got a long, dusty run of poor conditions ahead, but there is a little light at the end of the tunnel if you’re patient.
The first few days are a write-off. Thursday the 3rd and Friday the 4th are a total mess – bumpy cross-shore winds and chopped-up, poor surf. The swell is there, around 5ft to 7ft from the WSW, but it’s short-period stuff and the wind just ruins it. Saturday the 5th is a bit better with a long-period 12-second groundswell from the WNW showing 5ft, and the energy is moderate (654). The wind is light, but it’s still cross-on, so it’s only marginal. The water is sitting at 64°, which is a touch warmer than normal for this time of year.
We then hit a proper lull. Sunday the 6th drops right off to tiny, weak waves, and from Monday the 7th through to Thursday the 11th, it’s a grim pattern of strong, lumpy cross-onshore winds and messy, poor surf. The swell kicks up again on Monday the 7th with a big 8ft, 13-second groundswell from the W, but the wind is howling from the NW at 15 mph, cross-on, making it total slop. The combined energy is a whopping 1825, but it’s all for nothing.
Now, for the standouts. The only real window of quality comes on Saturday the 12th of September. The morning brings a clean, cross-off breeze from the SW with a 3ft swell from the WNW. The wind is light, the ocean is clean, and the conditions are “good”. It’s not a big swell, but for a break like St Agnes, a clean 3ft with a 10-second period is a proper little session. The afternoon stays clean but the swell picks up to 5ft. This is the best on offer, no question.
The other little gem is much further out. Tuesday the 15th of September morning looks glassy. The wind is from the ENE at just 3 mph, and the water is flat calm. The swell is 4ft from the W with a 9-second period. It’s small, but glassy conditions are a gift. The following morning, Wednesday the 16th, is also glassy with a 3ft swell. These are the only two days that look really clean. The rest of the run into the 18th is just windy and ordinary.
So, to sum it up: the first week is a write-off. Saturday the 12th is the pick of the bunch for a clean, fun session. Then keep an eye on the 15th and 16th for some glassy, small-wave surfing. Don’t hold your breath for the rest.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 21°C on Sun morning, min 15°C on Fri night). Winds decreasing (fresh winds from the SW on Thu night, calm by Sat afternoon). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Warm (max 22°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the SSW on Sun afternoon, fresh winds from the WSW by Mon night). | |||||||||||||||||||
Thu 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||
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) | WSW 8 | WSW 6 | W 8 | W 9 | WNW 10 | WNW 12 | WNW 11 | W 10 | W 9 | W 9 | W 9 | W 13 | W 12 | W 10 | W 9 | W 10 | W 9 | W 8 | W 8 | WSW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 308 | 341 | 687 | 642 | 671 | 647 | 415 | 190 | 79 | 73 | 96 | 2074 | 1480 | 1375 | 1184 | 1115 | 747 | 501 | 357 | 468 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-on | cross-on | cross-on | cross-on | cross | cross-off | off | off | cross-off | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | cross-off |
High Tide | 10:06PM5.53m | 10:33AM5.29m | 11:07PM5.05m | 11:43AM4.91m | 00:30AM4.71m | 1:16PM4.78m | 2:07AM4.73m | 2:47PM5.05m | 3:27AM5.10m | 3:55PM5.55m | 4:25AM5.59m | 4:47PM6.06m | ||||||||
Low Tide | 4:24AM1.31m | 4:55PM1.48m | 5:30AM1.73m | 6:18PM1.81m | 7:05AM1.94m | 8:02PM1.80m | 8:43AM1.76m | 9:28PM1.42m | 9:55AM1.32m | 10:29PM0.91m | 10:49AM0.82m | 11:18PM0.45m | ||||||||
 |  |  |  |  | | |  |  | | | | | | | | | |  |  | |
 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — |
 | 8:01 | — | — | 8:00 | — | — | 7:58 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — | — | 7:49 | — |
mm | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | 1 | 14 |
Temp °C | 19 | 20 | 17 | 17 | 16 | 16 | 17 | 15 | 21 | 22 | 18 | 17 | 17 | 17 | 17 | 16 | 16 | 17 | 17 | 18 |
Feels °C | 17 | 16 | 14 | 13 | 13 | 14 | 16 | 13 | 17 | 18 | 17 | 13 | 13 | 11 | 10 | 8 | 10 | 12 | 13 | 15 |
Swell 1 Height (m) Direction Period (s) | SW 15 | — | W 8 | SW 14 | WNW 10 | WNW 12 | WNW 11 | W 10 | W 9 | W 9 | W 9 | W 13 | W 12 | — | W 9 | — | S 11 | WNW 10 | S 10 | W 14 |
| kJ | 60 | — | 687 | 33 | 671 | 647 | 415 | 190 | 79 | 73 | 96 | 2074 | 1480 | — | 1184 | — | 2 | 137 | 2 | 4 |
Swell 2 Height (m) Direction Period (s) | — | — | SW 14 | SSW 14 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 12 | W 16 | — | S 12 | — | — | — | — | S 10 | S 10 | — |
| kJ | — | — | 33 | 41 | 32 | 18 | 17 | 17 | 16 | 6 | 81 | — | 3 | — | — | — | — | 2 | 2 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SSW 12 | SW 12 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 15 | 6 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WSW 8 | WSW 6 | — | W 9 | — | — | — | SE 2 | SSE 4 | S 5 | WSW 5 | — | — | W 10 | — | W 10 | W 9 | W 8 | W 8 | WSW 7 |
| kJ | 308 | 341 | — | 642 | — | — | — | 1 | 22 | 11 | 50 | — | — | 1375 | — | 1115 | 747 | 501 | 357 | 468 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 211 | 223 | 103 | 222 | 103 | 15 | 15 | 0 | 63 | 0 | 15 | 155 | 213 | 234 | 555 | 222 | 231 | 231 | 15 | 254 |
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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