St Agnes Surf Break

Lat Long: 50.32° N 5.23° W

St Agnes Surf Forecast and Surf Report

Issued: 6 am 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's St Agnes sea temperature is
18.8° C
1.8° 

St Agnes surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


St Agnes surf forecast from 15 Aug 2026:

  • Most powerful swell: Friday 21 Aug, 1AM (local time) - 7ft (2.1m), 10s period, WNW swell with 784 kJ wave energy.

Best Forecast Surf Conditions for St Agnes this week:

The most powerful waves expected at St Agnes in the next 16 days are 2.1m 10s and forecast to arrive on Friday (Aug 21) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Friday (Aug 21) at 7PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Fri 21st Aug)7ft (2.1m) 10s

Table - best surf conditions forecast for St Agnes over the next 16 days.


The Lowdown

Alright, folks, Rusty here. Let’s be straight with you. I’ve looked at the charts for the next couple of weeks, and I’ve got to be honest, it’s a bit of a rough stretch. We’ve got a real run of onshore and cross-onshore winds messing up just about everything that rolls through, so we’re not going to be seeing any classic days. The main issue is that we have swell, but the local winds are just tearing it to pieces.

We’re starting off with a little bit of energy in the water. This Saturday morning, there’s about 3ft of west swell with a short, weak 8-second period. The energy is only moderate at 115. But the north wind is blowing at 16 mph, cross-onshore, making it choppy and pretty much a mush burger. It’s a write-off. The afternoon doesn't get any better, with the wind picking up to 19 mph and the surf still poor.

The weekend carries on in the same vein. Sunday’s swell drops right off. The morning has only 1ft on offer, and a northerly wind is blowing straight onshore. There’s really nothing to get excited about, and the energy is weak. We're looking at knee-high slop.

Monday sees a little bounce in the swell, coming up to around 3ft, but the period remains short and weak. The wind is still cross-onshore, which just puts a cap on it. The wave energy is moderate, but it’s messy. Not a day for the log.

Tuesday, we get a bit of a cross-shore wind, and the swell is still in the 3-3ft range, but it’s cross-shore with a cross-chop. It's still poor. There’s light rain, too, which doesn't help the mood.

Now, we get a bit of a swell pulse mid-week. Wednesday morning sees 4ft of WNW swell, but the energy is ramping up to 321. The problem remains the wind—it’s cross-onshore at 16-19 mph, keeping it choppy.

Thursday is the biggest swell of the period. We’re looking at 6ft of WNW groundswell in the morning with a 9-second period, and the energy is strong, hitting 537. The afternoon gets to 6ft with 560. But again, the west-northwest wind is cross-onshore, blowing at 16-19 mph. It's going to be lumpy, wind-blown, and pretty challenging. The size is there, but it just isn't going to be clean. This is definitely a day for the experts only; the conditions are going to be rough.

Friday, the swell is still up there, 5ft in the morning, but the north-northwest wind is onshore and strengthening. The afternoon drops a bit to 4ft but the wind is even stronger. It’s all just blown out.

After that, we head into a bit of a lull. Next Saturday morning is tiny, around 2ft, with an easterly breeze. The afternoon is almost flat, 0.7ft from the SW with a 15-second period. We’ll see a couple of clean, tiny lines, but it's definitely not worth a paddle.

The following Sunday and Monday get even smaller, with occasional, weak, small groundswell. We're talking 0.7ft to 3ft. The wind is all over the place, from easterly to strong north. It’s a flat and messy spell.

Things start to wake up again around Tuesday the 25th. We get a pulse of north swell, 4ft, but it’s onshore wind again. This is more of the same story.

The end of the period, from the 28th onward, shows some promise with lighter winds and some clean cross-offshore mornings at St Agnes. There are a few small, clean waves, 1-2ft, but nothing with any size or power. It's still only really knee to waist high and, honestly, with such small surf and light winds, this is more of a skimboard or kite session than a surf. The waves and wind may be more interesting for the kites out there than for a board.

So, there it is. There’s no point in sugar-coating it. Not a single standout day in the whole run. We just have to wear it and wait for the wind gods to sort things out. The water temperature is running a touch warmer than usual, about 3°F above normal, which will feel nice if you do go in. But right now, I’d give this one a miss.

Keep the faith, check back later, and we’ll see if anything changes. This is Rusty, signing off.

Short Range Forecast

Mostly dry. Very mild (max 19°C on Sun night, min 16°C on Sat night). Wind will be generally light.

Days 4-6 Weather Summary

Moderate rain (total 15mm), heaviest on Tue night. Warm (max 20°C on Tue morning, min 16°C on Tue night). Mainly fresh winds.

Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
W
8
0.9
W
8
0.7
W
8
0.4
WNW
7
0.5
W
7
0.3
W
7
0.9
WNW
5
1
WNW
8
0.8
W
7
0.8
W
6
1
W
6
1.1
WNW
6
1.3
WNW
7
1.3
WNW
8
1.7
WNW
7
1.8
WNW
9
1.7
W
10
2.1
WNW
10
1.5
WNW
9
1.1
W
9
0.7
W
6
Wave Graph
Metric surfscale
Energy kJ
80
95
55
16
26
12
50
120
56
48
66
108
172
246
301
516
527
784
377
186
32
Wind (km/h)
25
N
30
N
25
N
15
NNW
15
NW
15
WNW
20
WNW
20
WNW
20
W
25
WSW
20
W
25
N
25
WNW
30
WNW
25
W
30
WNW
25
WNW
20
NW
25
NNW
30
NNW
10
NNW
Wind State
cross-on
on
on
on
on
cross-on
cross-on
cross-on
cross
cross
cross
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
High Tide
7:53PM6.76m
8:13AM6.37m
8:31PM6.49m
8:51AM6.09m
9:09PM6.08m
9:28AM5.72m
9:48PM5.59m
10:08AM5.28m
10:29PM5.07m
10:52AM4.83m
11:20PM4.59m
11:51AM4.44m
00:32AM4.24m
Low Tide
1:54PM0.05m
2:18AM0.07m
2:31PM0.25m
2:54AM0.38m
3:07PM0.57m
3:29AM0.78m
3:44PM0.99m
4:05AM1.23m
4:23PM1.44m
4:45AM1.69m
5:10PM1.88m
5:37AM2.10m
6:16PM2.23m
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
cloud
light rain
rain showers
light rain
cloud
rain showers
light rain
rain showers
rain showers
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
6:11
6:13
6:13
6:16
6:16
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:40
8:38
8:37
8:35
8:32
8:30
8:29
 mm
1
3
1
4
1
2
3
Temp °C
18
18
16
18
18
19
18
19
18
20
20
18
18
18
16
18
18
16
16
16
16
Feels °C
14
14
12
16
16
19
17
17
17
19
19
16
12
12
12
13
14
12
12
11
13
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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