Surf Forecasts:
St Agnes surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 4PM (local time) - 5ft (1.5m), 8s period, SSW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 4AM (local time) - 4.5ft (1.3m), 9s period, W swell with 287 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 7AM (local time) - 2ft (0.6m), 10s 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 (Aug 22) at 7AM. The primary swell is predicted to be 0.6m and 10s 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 1.3m 9s and forecast to arrive on Friday (Aug 21) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Monday (Aug 24) at 1PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 22nd Aug) | 2ft (0.6m) 10s |
| Best Surf | 4PM (Wed 26th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 4AM (Fri 21st Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for St Agnes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Looks like we’ve got a bit of a flat spell on the horizon for St Agnes, but don’t write it off just yet. The next couple of weeks are mostly a write-off for decent waves, but there’s a glimmer of hope if you’re patient.
Right now and through the rest of August, it’s pretty grim. We’ve got onshore winds and messy, choppy conditions. The water temperature is sitting at 65°, which is a touch warmer than normal for this time of year, so at least it’s pleasant for a paddle. The swell energy is weak for most of this period, with readings around 243 (Friday morning) dropping to just 49 (Saturday morning). There’s a tiny window on Sunday the 23rd morning with a clean 1 ft swell from the SW, period a long 14 seconds, and light ENE winds, but it’s barely surfable – the energy is only 65. That’s more of a longboard chill session than anything exciting.
The real downer is the wind. Most days are plagued by cross-onshore or onshore breezes, gusting up to 28 mph on the 24th. That’s kite-surfing weather, not paddle-surfing. The swell direction is mostly W to WNW, but the optimum for St Agnes is WSW, so we’re not getting the best angle either.
Wednesday the 26th afternoon is the only standout in the whole 16-day window. We’ll see a 5 ft SSW swell arrive, with a period of 8 seconds and moderate energy of 345. The wind will be light and cross-offshore from the SSW, making for clean conditions. It’s not huge, but it’s the best we’ll get – expect good surf conditions. That’s your one session to mark in the diary.
After that, it’s back to poor conditions. The 29th sees a bigger 8 ft swell from the W, but with cross-onshore winds at 16 mph, it’ll be choppy and messy – better left for the experts or the kites. The first week of September is more of the same: small, weak, and windy. The 3rd of September afternoon brings a 7 ft WSW swell with strong offshore winds, but the energy is moderate at 612, and the wind is a solid 28 mph – again, more for the experienced crew.
Honestly, if you’re keen, the 26th afternoon is your best bet. Otherwise, it’s a long wait. The blank run is pretty normal for this area, and forecasts can change. Stay tuned.
Rusty.
Short Range ForecastSome drizzle, heaviest during Fri morning. Very mild (max 19°C on Sun morning, min 14°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Tue afternoon. Warm (max 20°C on Sun afternoon, min 16°C on Sun night). Winds increasing (light winds from the E on Sun night, strong winds from the ESE by Mon afternoon). | |||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||
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 9 | W 10 | W 9 | WNW 8 | W 9 | W 10 | W 9 | SW 15 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | WNW 10 | W 10 | SSW 8 | SSW 7 | SSW 8 | W 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 721 | 414 | 146 | 119 | 24 | 29 | 29 | 54 | 51 | 65 | 38 | 31 | 28 | 27 | 19 | 47 | 109 | 188 | 256 | 202 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | on | cross-off | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | glassy |
High Tide | 11:20PM4.59m | 11:51AM4.44m | 00:32AM4.24m | 1:16PM4.23m | 2:06AM4.17m | 2:47PM4.35m | 3:25AM4.40m | 3:52PM4.70m | 4:18AM4.77m | 4:39PM5.13m | 4:59AM5.18m | 5:16PM5.57m | ||||||||
Low Tide | 5:10PM1.88m | 5:37AM2.10m | 6:16PM2.23m | 6:55AM2.37m | 7:50PM2.36m | 8:32AM2.35m | 9:20PM2.18m | 9:47AM2.05m | 10:19PM1.81m | 10:37AM1.64m | 11:02PM1.39m | 11:16AM1.23m | 11:39PM0.98m | |||||||
 |  |  | | | | | | | |  |  | |  | |  |  | |  |  | |
 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:24 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 2 | — | 5 | 5 | 5 | 1 | 3 |
Temp °C | 17 | 15 | 15 | 15 | 15 | 18 | 17 | 16 | 19 | 20 | 17 | 20 | 20 | 19 | 20 | 20 | 17 | 19 | 20 | 17 |
Feels °C | 12 | 12 | 10 | 10 | 13 | 15 | 13 | 13 | 16 | 17 | 15 | 12 | 12 | 14 | 17 | 18 | 17 | 16 | 19 | 18 |
Swell 1 Height (m) Direction Period (s) | SW 14 | W 10 | W 9 | WNW 8 | WNW 6 | N 6 | WNW 6 | W 9 | N 4 | SW 14 | WSW 10 | N 4 | SW 13 | SW 13 | WNW 10 | W 10 | W 9 | W 9 | W 8 | SSW 8 |
| kJ | 33 | 414 | 146 | 119 | 24 | 31 | 13 | 14 | 6 | 65 | 38 | 3 | 28 | 27 | 19 | 47 | 60 | 55 | 71 | 155 |
Swell 2 Height (m) Direction Period (s) | — | SSW 14 | SSW 13 | SSW 13 | N 5 | W 6 | W 9 | SW 15 | SW 14 | N 4 | SW 14 | SW 14 | W 9 | SW 8 | NE 5 | SW 8 | SW 13 | SW 12 | WNW 11 | W 9 |
| kJ | — | 19 | 17 | 17 | 14 | 20 | 25 | 54 | 51 | 6 | 32 | 31 | 6 | 3 | 7 | 17 | 7 | 6 | 12 | 202 |
Swell 3 Height (m) Direction Period (s) | — | — | SSW 16 | SSW 16 | W 9 | W 10 | SSW 15 | NW 6 | W 9 | W 8 | SE 5 | SW 9 | SW 9 | W 8 | SW 8 | NNE 5 | — | N 5 | SW 12 | SW 12 |
| kJ | — | — | 25 | 25 | 24 | 29 | 21 | 1 | 14 | 5 | 4 | 13 | 3 | 6 | 11 | 3 | — | 1 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | WNW 9 | N 5 | N 5 | N 5 | — | — | N 5 | N 4 | E 4 | — | NNE 4 | ESE 6 | ESE 7 | ESE 4 | SE 3 | SSE 4 | SSW 8 | SSW 7 | SSW 8 | ESE 4 |
| kJ | 721 | 18 | 55 | 34 | — | — | 29 | 14 | 5 | — | 3 | 50 | 70 | 43 | 5 | 5 | 109 | 188 | 256 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 213 | 27 | 81 | 241 | 27 | 1 | 27 | 27 | 0 | 5 | 27 | 255 | 198 | 194 | 194 | 0 | 0 | 20 | 0 | 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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