Porthtowan Surf Break

Lat Long: 50.28° N 5.25° W

Porthtowan Surf Forecast and Surf Report

Issued: 12 am 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Porthtowan sea temperature is
18.4° C
1.4° 

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


Porthtowan surf forecast from 19 Aug 2026:

  • Best quality surf: Wednesday 26 Aug, 4AM (local time) - 5.5ft (1.7m), 8s period, SW swell with cross-offshore winds.
  • Most powerful swell: Thursday 20 Aug, 10AM (local time) - 8ft (2.5m), 9s period, WNW swell with 933 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 26 Aug, 4AM (local time) - 5.5ft (1.7m), 8s period with SW 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 Wednesday (Aug 26) at 4AM. The primary swell is predicted to be 1.5m and 9s period with a secondary swell of 1.2m and 9s. Another secondary swell of 1.7m and 8s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Porthtowan in the next 16 days are 2.5m 9s and forecast to arrive on Thursday (Aug 20) 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 1.5m 5s period and expected on Tuesday (Aug 25) at 4PM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 26th Aug)5.5ft (1.7m) 8s
Best Surf 4AM (Wed 26th Aug)5.5ft (1.7m) 8s
Most Powerful10AM (Thu 20th Aug)8ft (2.5m) 9s

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


The Lowdown

Right then, let's have a look at what's on offer for Porthtowan over the next couple of weeks. Straight up, I gotta be honest with you – it's a bit of a grim stretch for the most part. The wind is just not playing ball, and the surf quality is getting hammered.

We're looking at a long run of poor surf conditions starting from Wednesday, 19th August. The swell is there, but it's ragged. Wednesday morning has a 4ft swell from the WNW with a 9-second period, but the wind is onshore at 12 mph, and the combined energy is only 302 – weak and messy. It gets worse from there. Thursday the 20th sees a jump in size to 8ft in the morning, but the wind is a fresh cross-onshore, and the energy is moderate at 954. It's lumpy, it's choppy, and it's not surfable. This pattern of cross-onshore winds and junky conditions carries right through the rest of the week and into the next. Friday, Saturday, Sunday... all the same story. The swell drops right off by Sunday the 23rd to a tiny 1.0ft, and while the period is long at 14 seconds, the energy is a paltry 65. Not worth getting wet for.

There's a real blank run here. From the 19th right through to the morning of Thursday, 27th August, there's just nothing to recommend. That's over a week of onshore crap.

Now, Thursday the 27th is a bit of a tease. The morning shows a 8ft swell from the WNW with a period of 11 seconds and a combined energy of 1245 – that's a strong, solid amount of energy. The wind is a light cross-onshore and the model flags it as "marginal". It's a big swell, over 8ft, so that's expert-only territory. The problem is it's a beach break, and with a period of 11 seconds, it's got some groundswell to it, but the wind is still not clean. It's the only thing that even gets a score above zero, but I wouldn't be rushing.

The rest of the run into September is more of the same. Strong winds, big messy swells. By the 30th of August, we're seeing a 10ft swell with 19 mph onshore winds. On the 31st, it's a 13ft monster with fresh onshore winds. The energy numbers are massive – 4196 and 4299 – but it's a washing machine. This is more kite-surfing territory than paddle surfing. The sheer power and onshore wind will make it a brutal, closed-out mess.

The water temperature anomaly isn't mentioned, so it's about average for the time of year.

Honestly, if you're looking for a clean, fun wave, you're not going to find it here in this forecast. The only faint glimmer is that Thursday morning, 27th August, but with the caveats of size and wind, it's a long shot. The best advice is to wait for the next forecast update.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Fri morning. Very mild (max 18°C on Tue night, min 13°C on Fri morning). Mainly fresh winds.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 19°C on Mon morning, min 14°C on Fri night). Wind will be generally light.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
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
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
WNW
9
1.5
W
6
2.2
W
8
2.5
WNW
9
2.2
WNW
9
1.4
W
9
1.1
W
8
0.8
WNW
8
0.3
SW
16
1
NNW
6
1.1
N
6
0.3
SW
15
0.3
SW
14
0.3
SW
14
0.3
SW
14
0.2
SSW
14
0.2
SSW
14
0.2
SSW
13
0.5
WNW
10
1
W
10
2.2
SW
8
Wave Graph
Metric surfscale
Energy kJ
254
160
634
933
807
347
165
90
39
67
88
34
31
32
32
19
18
17
59
192
587
Wind (km/h)
20
WNW
30
W
25
W
30
WNW
25
NW
10
N
15
NNE
15
NNW
15
N
25
N
20
N
15
NNE
20
NNE
20
N
15
NNE
15
E
20
N
10
SSE
15
WNW
15
WSW
25
SSE
Wind State
on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-off
cross-on
cross-off
on
cross-on
cross-off
High Tide
10:08AM5.28m
10:29PM5.07m
10:52AM4.83m
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
Low Tide
4:05AM1.23m
4:23PM1.44m
4:45AM1.69m
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
clear
part cloud
clear
rain showers
part cloud
part cloud
light rain
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
part cloud
cloud
part cloud
clear
part cloud
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:13
6:16
6:16
6:18
6:20
6:22
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:32
8:30
8:29
8:27
8:24
8:22
8:21
 mm
1
4
9
Temp °C
18
18
17
18
18
16
15
15
15
16
17
17
18
17
17
19
19
17
19
19
17
Feels °C
15
12
13
13
14
14
12
11
12
11
13
15
14
13
14
16
15
16
16
16
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 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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