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 am 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):

  • Morning surf: Morning surf (20 Aug, local time) - 1.5ft (0.5m), 6s period with SW swell.
  • 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 2PM is: 0.4m 6s primary swell from a Southwest direction and 0.1m 14s secondary swell from a Southwest direction (forecast issued at 06:00am August 20). An open ocean swell of 1.2m 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)1.5ft (0.5m)6s
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 6mm), mostly falling on Thu morning. Very mild (max 16°C on Fri afternoon, min 12°C on Fri night). Wind will be generally light.

Thursday
20
Friday
21
Saturday
22
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)
0
1
0
0
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
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SW
7
0.6
SW
6
0.5
SW
6
0.4
SW
6
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
6
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
52
29
16
14
10
8
8
8
8
7
7
1
7
7
7
7
10
10
8
8
8
8
8
Wind (km/h)
20
NW
15
NNW
25
N
25
NNE
25
N
25
N
20
N
20
N
15
NNW
15
NW
15
NW
10
ENE
20
NNE
15
NNE
15
N
15
N
15
NNW
10
NNW
15
NNW
15
NW
15
NW
10
NNW
10
NNE
Wind State
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
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
9:40AM1.27m
10:08PM1.38m
10:45AM1.54m
11:34PM1.55m
12:20PM1.61m
rain showers
rain showers
light rain
light rain
clear
clear
clear
part cloud
clear
clear
rain showers
rain showers
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:05
6:07
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:36
8:32
8:30
 mm
3
2
2
2
1
1
Temp °C
14
14
15
14
15
15
14
13
13
13
14
15
16
15
14
13
13
12
13
14
14
15
15
Feels °C
11
12
11
10
10
10
10
9
10
10
11
13
12
11
11
10
11
10
10
11
11
13
13
  • 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 

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