Cable Bay (Porth Trecastell) Surf Break

Lat Long: 53.22° N 4.51° W

Cable Bay (Porth Trecastell) 48 hour detailed Surf Forecast

Issued: 12 am 09 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.3° C
1.7° 

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 (09 Aug):

  • Morning surf: Morning surf (09 Aug, local time) - 1.5ft (0.4m), 3s period with SW swell.
  • Afternoon surf: Afternoon surf (09 Aug, local time) - 0.5ft (0.1m), 12s period with SW swell.
  • Evening surf: Evening surf (09 Aug, local time) - 1.5ft (0.4m), 4s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 8AM is: 0.4m 3s primary swell from a Southwest direction and 0.1m 6s secondary swell from a Southwest direction, 0.1m 11s secondary swell from a South direction (forecast issued at 12:00am August 09). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (09 Aug)1.5ft (0.4m)3s
Afternoon (09 Aug)0.5ft (0.1m)12s
Evening (09 Aug)1.5ft (0.4m)4s

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


Short Range Forecast

Mostly dry. Warm (max 21°C on Tue morning, min 13°C on Sun night). Wind will be generally light.

Sunday
9
Monday
10
Tuesday
11
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)
0
0
0
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)
0.6
SW
4
0.6
SW
4
0.4
SW
4
0.1
S
12
0.2
SSW
6
0.1
SW
12
0.1
SW
12
0.4
SSW
4
0.4
SSW
4
0.4
SW
4
0.4
SW
5
0.4
SW
6
0.3
SW
6
0.3
SW
6
0.1
SW
7
0.2
SSW
6
0.2
SSW
6
0.2
SSW
6
0.2
SSW
6
0.2
SSW
6
0.1
SW
6
0.1
SW
6
0.2
SSW
6
0.1
S
11
Wave Graph
Metric surfscale
Energy kJ
14
9
4
3
5
6
6
6
7
5
6
8
5
5
2
4
4
4
4
4
1
1
4
2
Wind (km/h)
20
S
15
S
15
S
20
SSW
15
SW
20
SSW
20
SW
20
NNW
15
N
10
N
10
N
10
NNW
15
NW
15
NNW
15
NNE
15
NE
15
ENE
10
ENE
10
ESE
5
S
20
SSW
15
SW
5
SW
5
ESE
Wind State
cross-on
cross-on
cross-on
on
on
on
on
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
off
off
off
cross-off
cross-off
cross-on
cross-on
on
on
cross-off
High Tide
6:34AM3.25m
7:10PM3.38m
7:48AM3.43m
8:14PM3.71m
8:49AM3.66m
9:07PM4.05m
Low Tide
1:01AM1.07m
1:38PM0.97m
2:14AM0.73m
2:42PM0.68m
3:13AM0.33m
3:34PM0.38m
clear
part cloud
part cloud
cloud
part cloud
part cloud
cloud
part cloud
clear
clear
part cloud
part cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:47
5:48
5:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:58
8:57
8:54
 mm
Temp °C
16
16
15
16
17
18
17
15
14
14
13
14
15
16
16
15
15
16
17
19
21
21
21
21
Feels °C
13
14
13
13
15
15
15
13
12
12
11
12
12
13
13
11
11
13
15
17
17
18
20
20
  • 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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