Porthtowan Surf Break

Lat Long: 50.28° N 5.25° W

Porthtowan Surf Forecast and Surf Report

Issued: 12 am 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porthtowan sea temperature is
18.6° C
1.6° 

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


Porthtowan surf forecast from 11 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period, W swell with offshore winds.
  • Most powerful swell: Thursday 13 Aug, 7AM (local time) - 4ft (1.2m), 11s period, W swell with 332 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 11 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period with W swell.

Best Forecast Surf Conditions for Porthtowan this week:

The surf forecast for Porthtowan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 11) at 10PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.3m and 7s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Porthtowan in the next 16 days are 1.2m 11s and forecast to arrive on Thursday (Aug 13) 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 5s period and expected on Wednesday (Aug 12) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Tue 11th Aug)1.5ft (0.5m) 11s
Best Surf10PM (Tue 11th Aug)1.5ft (0.5m) 11s
Most Powerful 7AM (Thu 13th Aug)4ft (1.2m) 11s

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


The Lowdown

G'day, I'm Rusty. Let's have a look at what's on the cards for Porthtowan over the next couple of weeks.

Alright, first up, I gotta be straight with you – the next week and a bit is pretty grim. We're looking at a solid stretch of nothing much from the 10th right through to the 21st of August. There's hardly a wave worth paddling for, and the conditions are just messy. The wind is mostly cross-on or onshore, which is a recipe for chop and poor surf. The water temp is sitting at 66°, which is a touch warmer than normal for this time of year, but that's about the only nice thing I can say.

The first real glimmer of hope comes Wednesday morning, the 18th of August. It's still small, with a 3ft swell from the west, but the wind is a clean offshore from the ESE. The combined energy is weak (111), but at least it's clean. You'll be scratching around for little waves, but it's surfable. Then it goes quiet again.

Now, hold onto your board, because Saturday the 22nd of August is a monster. The swell is predicted to be huge – 13ft from the WNW with a period of 11 seconds. The combined energy is massive (3583). But here's the catch: the wind is a moderate cross-on breeze from the north, and the forecast actually says it's predicted to be too big for this break. This is expert-only territory, and even then, it's going to be a washing machine. The break is a beach setup, so with that much energy and cross-on wind, it’s probably more interesting for the kite surfers than paddle surfers.

The real standout, though, is Monday the 24th of August. Mark it in your calendar. We've got a really nice looking morning. The swell is a clean 3ft from the west, but the period is a very long 14 seconds – that's proper groundswell energy. The combined energy is moderate (492), and the wind is glassy – a light offshore from the SE. For a beach break, that long period might make the waves a bit straight, but with glassy conditions, it's going to be clean and have some punch. The crowd profile says "often," so don't expect to have it to yourself, but if you can get out there, it’s the best on offer by a long shot. After that, Tuesday the 25th has a 3ft west swell with an offshore ESE wind, but the energy drops off (204) and it's not as special.

So, to sum it up: the first week and a half is a write-off, then we get a massive, messy swell that's too big. The clear winner is the 24th of August morning – glassy, long-period groundswell, and clean conditions. Get on it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Wed afternoon, min 16°C on Mon night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Thu night, min 15°C on Sat night). Mainly fresh winds.

Tuesday
11
Wednesday
12
Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
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
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
WNW
8
0.2
W
13
0.6
W
11
0.8
W
10
0.9
W
9
1
W
10
1.2
W
11
1.2
W
10
1.1
W
10
0.9
W
9
1.2
W
8
1
W
8
1
W
8
0.9
WNW
8
0.7
W
8
0.4
WNW
7
0.4
W
7
0.6
N
4
0.7
N
5
0.4
WNW
9
0.7
W
8
Wave Graph
Metric surfscale
Energy kJ
19
12
85
125
139
184
319
284
220
126
205
136
124
96
55
17
16
12
21
28
63
Wind (km/h)
25
SE
20
ESE
10
ESE
10
NE
10
N
10
N
20
NNW
20
WNW
15
WNW
15
WNW
20
NNW
20
NNW
20
N
20
NNW
20
NNE
20
NNE
30
N
30
NNE
25
NE
25
NNE
15
E
Wind State
off
off
off
cross
cross-on
cross-on
on
on
cross-on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-off
High Tide
4:32AM5.62m
4:57PM6.03m
5:25AM6.02m
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
Low Tide
10:59AM0.85m
11:30PM0.50m
11:49AM0.44m
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
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
cloud
part cloud
part cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:05
6:07
6:07
6:09
6:11
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:47
8:45
8:44
8:43
8:40
8:38
8:37
 mm
Temp °C
23
23
20
25
26
20
21
22
19
19
18
17
18
17
16
17
17
15
20
21
19
Feels °C
20
20
18
23
24
19
20
22
19
18
15
15
15
13
13
13
12
9
14
16
14
  • 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 Porthtowan Surf forecast

The above surf forecast table for Porthtowan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Porthtowan can be found by selecting the local surf guide option on the grey menu. Our Porthtowan 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 (Porthtowan) 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 Porthtowan 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.

Porthtowan is 8 km (5 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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