Porthtowan Surf Break

Lat Long: 50.28° N 5.25° W

Porthtowan Surf Forecast and Surf Report

Issued: 6 am 17 Jul 2026 (local time)

Forecast update in  hr  min

Today's Porthtowan sea temperature is
17.7° C
1.5° 

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


Porthtowan surf forecast from 17 Jul 2026:

  • Best quality surf: Tuesday 21 Jul, 10AM (local time) - 2.5ft (0.8m), 6s period, N swell with glassy winds.
  • Most powerful swell: Thursday 23 Jul, 4AM (local time) - 5ft (1.6m), 6s period, N swell with 188 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 21 Jul, 10AM (local time) - 2.5ft (0.8m), 6s period with N 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 (Jul 21) at 10AM. The primary swell is predicted to be 0.8m and 6s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Porthtowan in the next 16 days are 1.6m 6s and forecast to arrive on Thursday (Jul 23) 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 1.3m 6s period and expected on Sunday (Jul 19) at 1PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)10AM (Tue 21st Jul)2.5ft (0.8m) 6s
Best Surf10AM (Tue 21st Jul)2.5ft (0.8m) 6s
Most Powerful 4AM (Thu 23rd Jul)5ft (1.6m) 6s

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


The Lowdown

Alright folks, Rusty here. Let’s get straight into it. I’ve been staring at the charts for Porthtowan and, to be honest, it’s a tough run. The next 16 days are looking pretty bleak for a proper paddle session. There’s a big gap of nothing worthwhile right from the start, and it’s not until Tuesday morning, the 21st of July, that we see a tiny flicker of something surfable, and even then, it’s a stretch.

We’ve got a long stretch of poor surf conditions kicking off the forecast. Friday the 17th through to Monday the 20th is all flat, choppy, and messy. The swell is tiny, mostly under 2 ft, and the wind is predominantly cross-onshore, often from the north or north-northeast, making it lumpy and unappealing. The combined wave energy is weak, ranging from 23 to 94, so there’s just no power in the water. You’d be better off staying home.

The first real chance comes on Tuesday morning, the 21st of July. The sky is clear, and we get a moment of magic with a glassy wind. The swell is small at 3 ft from the north, with a short period of 6 seconds. The combined energy (74) is still weak, and the waves are described as "surfable but very ordinary conditions." It’s not a standout, but it’s the only time the wind is truly clean. The water temp is 64°F, which is a touch warmer than normal for this time of year.

After that, it’s back to the same old story. From Tuesday afternoon all the way through to the end of the month, the wind swings back to cross-onshore, often from the north or north-northwest, and picks up speed. The swell height stays small, mostly between 1 ft and 4 ft, but the period is short, and the energy is low. The only exception is a small bump in combined energy on Thursday the 23rd (122) and Wednesday the 29th (135), but the wind is so strong – 28 mph from the west-northwest for the latter – that it’s just messy and blown out. The surf is too small and too weak for the conditions to be worthwhile for paddle surfing; honestly, this setup looks more interesting for kite surfing than paddle surfing.

The first week of August isn’t any kinder. The swell remains tiny, and the cross-onshore winds keep the surface choppy. There’s no real standout to point you toward. This is a blank run, and for a spot like Porthtowan, a poor run like this is more normal for the area when the wind doesn’t cooperate. Keep an eye on the forecasts, but for now, it’s a long wait.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 23°C on Fri morning, min 15°C on Sat night). Winds decreasing (fresh winds from the N on Sat afternoon, light winds from the NE by Sun night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Tue morning, min 15°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the N by Wed afternoon).

Friday
17
Saturday
18
Sunday
19
Monday
20
Tuesday
21
Wednesday
22
Thursday
23
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
1
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)
0.3
W
8
0.2
SSW
13
0.3
W
8
0.9
N
5
1.2
N
5
1.3
N
6
0.8
N
6
0.6
N
5
0.8
N
5
0.6
N
5
0.7
N
5
1
N
6
0.8
N
6
0.7
N
6
0.4
WNW
10
1
N
5
1.1
N
5
1.5
N
6
1.2
N
6
0.8
N
5
0.6
N
5
Wave Graph
Metric surfscale
Energy kJ
12
16
12
37
77
108
42
20
29
15
24
64
40
33
31
49
59
165
92
33
20
Wind (km/h)
10
W
20
NNW
15
NNW
25
N
30
N
25
NNE
20
E
20
NNE
15
NNE
5
NNE
25
N
15
N
5
E
15
NNW
15
N
25
NNE
30
N
30
NNE
15
NNE
5
N
10
NE
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
cross
cross-on
cross-on
cross-on
cross-on
glassy
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
High Tide
8:18PM6.65m
8:42AM6.17m
9:02PM6.40m
9:26AM5.89m
9:47PM6.02m
10:10AM5.54m
10:32PM5.58m
10:57AM5.17m
11:21PM5.12m
11:50AM4.83m
00:18AM4.74m
12:52PM4.59m
1:26AM4.50m
Low Tide
2:18PM0.21m
2:48AM0.18m
3:02PM0.40m
3:31AM0.46m
3:45PM0.71m
4:14AM0.83m
4:29PM1.08m
4:58AM1.24m
5:16PM1.47m
5:45AM1.62m
6:09PM1.82m
6:41AM1.93m
7:14PM2.05m
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:30
5:31
5:31
5:33
5:33
5:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:23
9:22
9:22
9:21
9:20
9:19
9:16
 mm
Temp °C
23
23
19
17
17
16
21
21
19
21
19
18
22
22
19
17
17
17
18
20
19
Feels °C
21
20
18
14
12
12
16
16
17
18
14
16
20
19
17
12
12
13
16
20
18
  • 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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