Porthtowan surfForecast / Cornwall (North) / UK

information circle48hr Weather and Surf, issued 12 am Wednesday 20 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Porthtowan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Porthtowan sea temperature is
12.6° C
(Which is slightly warmer than usual)

How big are the waves at Porthtowan today?

The current surf forecast for Porthtowan at 5AM is: 4.0m 14s primary swell from a West direction and 1.3m 8s secondary swell from a South-southwest direction (forecast issued at 12:00am May 20). The wind direction is predicted to be cross-shore and the swell rating is 11.

Time (BST) & DateWave HeightWave Period
Morning (20 May)13ft (4.0m)14s
Afternoon (20 May)10ft (3.0m)13s
Evening (20 May)8ft (2.5m)12s

Table - waves today at Porthtowan. (Swell directed towards the surf break)


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Mostly dry. Very mild (max 18°C on Fri morning, min 12°C on Tue night). Winds decreasing (fresh winds from the WSW on Tue night, calm by Fri afternoon).

Wednesday
20
Thursday
21
Friday
22
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
1 AM
4 AM
7 AM
10 AM
1 PM
4 PM
7 PM
10 PM
Rating
(10 max)
!
!
!
!
!
2
3
3
3
2
2
2
2
2
2
2
2
3
3
3
2
2
2
1
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
4
WSW
16
4
W
14
4
W
14
4
WSW
14
3.5
W
13
3
W
13
2.5
W
13
2.5
W
12
2.3
WSW
12
2.2
WSW
12
2
WSW
12
1.9
WSW
11
1.8
WSW
11
1.7
WSW
11
1.6
WSW
10
1.6
WSW
10
1.7
WSW
10
1.8
WSW
10
1.9
WSW
11
1.7
WSW
11
1.6
WSW
11
1.6
WSW
11
1.6
WSW
11
1.6
WSW
11
Wave Graph
Metric surfscale
Energy kJ
6919
6612
6112
5507
3922
3082
2431
1901
1444
1302
1047
854
705
619
588
492
598
690
917
711
634
645
622
541
Wind (km/h)
35
WSW
30
WSW
30
WSW
30
WSW
25
WSW
25
SW
20
SSW
20
S
20
S
20
S
20
S
20
S
20
S
20
SE
25
SE
25
SE
15
SSE
10
SSE
10
SSE
10
SSW
10
SW
10
SSW
5
S
5
NW
cross
cross
cross
cross
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
glassy
on
High Tide
8:20AM6.16m
8:44PM6.25m
9:13AM5.76m
9:39PM5.88m
10:12AM5.35m
Low Tide
2:21AM0.27m
2:42PM0.58m
3:16AM0.59m
3:37PM0.93m
4:16AM0.95m
4:37PM1.28m
part cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:28
5:26
5:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:07
9:07
9:09
Temp °C
12
12
12
13
14
15
14
13
13
13
13
15
16
17
15
15
16
14
14
16
18
18
17
16
6
7
7
8
9
11
10
10
9
9
10
11
12
13
11
11
13
13
13
15
18
17
18
16
Swell 1
Height (m)
Direction
Period (s)
1.9
WSW
16
4
W
14
4
W
14
4
WSW
14
3.5
W
13
3
W
13
2.5
W
13
2.5
W
12
2.3
WSW
12
2.2
WSW
12
2
WSW
12
1.9
WSW
11
1.8
WSW
11
1.7
WSW
11
1.6
WSW
10
1.6
WSW
10
1.7
WSW
10
1.8
WSW
10
1.9
WSW
11
1.7
WSW
11
1.6
WSW
11
1.6
WSW
11
1.6
WSW
11
1.6
WSW
11
Energy kJ
1644
6612
6112
5507
3922
3082
2431
1901
1444
1302
1047
854
705
619
588
492
598
690
917
711
634
645
622
541
Swell 2
Height (m)
Direction
Period (s)
0.6
W
13
1.3
SSW
8
0.7
S
7
0.1
SW
16
0.1
SW
16
0.1
SW
16
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.2
SSW
15
0.1
SW
14
0.1
S
18
0.8
SSW
6
0.7
S
6
0.6
S
6
0.5
S
6
0.4
S
6
Energy kJ
130
196
52
10
10
10
9
9
9
8
8
21
8
6
45
41
28
18
10
Swell 3
Height (m)
Direction
Period (s)
0.1
S
18
0.1
S
18
0.4
ESE
4
0.1
S
18
0.3
ESE
4
0.2
ESE
4
0.2
ESE
4
0.1
SW
16
Energy kJ
6
6
6
6
3
1
1
10
Wind waves
Height (m)
Direction
Period (s)
4
WSW
16
1.3
SSW
7
1
SSW
8
0.6
SE
3
0.6
SE
4
0.4
ESE
4
Energy kJ
6919
172
123
7
12
5
Nearest Offshore or Glassy
Rating
(10 max)
4
3
5
3
2
4
4
3
3
3
3
2
3
2
2
2
2
3
3
3
2
2
2
2
Distance (km)
499
511
210
57
392
17
17
16
16
16
16
16
5
0
0
0
0
0
0
0
0
0
0
10
Best forecast wave conditions in North Cornwall
Rating
(10 max)
4
4
4
3
3
3
3
3
3
3
3
2
3
3
3
3
3
3
3
Best forecast wave conditions in United Kingdom
Rating
(10 max)
3
2
1
3
2
4
4
4
4
4
3
3
3
3
3
3
2
3
3
3
3
3
3
3
Header Global
Rating
(10 max)
5
5
5
5
4
4
5
5
5
5
5
5
5
4
4
4
4
5
7
7
7
7
5
5
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Porthtowan surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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