Cable Bay (Porth Trecastell) Surf Break

Lat Long: 53.22° N 4.51° W

Cable Bay (Porth Trecastell) 48 hour detailed Surf Forecast

Issued: 6 pm 20 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
18.2° C
2.5° 

Cable Bay (Porth Trecastell) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


How big are the waves at Cable Bay (Porth Trecastell) today (20 Aug):

  • Afternoon surf: Afternoon surf (20 Aug, local time) - 1.5ft (0.4m), 6s period with SW swell.
  • Evening surf: Evening surf (20 Aug, local time) - 1ft (0.3m), 6s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 11PM is: 0.1m 14s primary swell from a Southwest direction and 0.2m 6s secondary swell from a South-southwest direction (forecast issued at 06:00pm August 20). An open ocean swell of 1.0m 5s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (20 Aug)--
Afternoon (20 Aug)1.5ft (0.4m)6s
Evening (20 Aug)1ft (0.3m)6s

Table - waves today at Cable Bay (Porth Trecastell). (Swell directed towards the surf break)


Short Range Forecast

Light rain (total 3mm), mostly falling on Thu night. Very mild (max 17°C on Fri afternoon, min 12°C on Fri night). Wind will be generally light.

Thu
20
Friday
21
Saturday
22
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)
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)
0.4
SW
6
0.3
SW
6
0.3
SW
6
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
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
Wave Graph
Metric surfscale
Energy kJ
10
8
8
8
8
7
7
7
7
7
7
7
10
10
8
8
8
8
8
Wind (km/h)
30
N
25
N
20
NNW
20
NNW
20
NNW
20
NNW
15
N
15
ENE
15
NNE
20
N
15
N
15
N
15
NNW
10
NNW
15
NNW
20
NNW
20
NNW
15
NNW
10
N
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
3:26PM3.00m
4:05AM2.90m
4:46PM2.83m
5:38AM2.76m
6:19PM2.84m
Low Tide
10:08PM1.38m
10:45AM1.54m
11:34PM1.55m
12:20PM1.61m
clear
clear
clear
part cloud
clear
rain showers
light rain
rain showers
clear
clear
clear
clear
clear
clear
cloud
cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:36
8:32
8:30
 mm
1
1
1
Temp °C
16
15
14
13
13
13
14
15
17
16
14
13
13
12
13
14
14
14
14
Feels °C
11
10
10
9
9
9
11
12
13
12
11
10
11
10
10
11
10
11
12
  • 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
How to use the Wavefinder 

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 Cable Bay (Porth Trecastell) 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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