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 11 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.7° C
2.1° 

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 (11 Aug):

  • Morning surf: Morning surf (11 Aug, local time) - 0.5ft (0.2m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (11 Aug, local time) - 1ft (0.3m), 3s period with SSW swell.
  • Evening surf: Evening surf (11 Aug, local time) - 0.5ft (0.1m), 11s period with S swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 10AM is: 0.2m 6s primary swell from a South-southwest direction (forecast issued at 06:00am August 11). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (11 Aug)0.5ft (0.2m)6s
Afternoon (11 Aug)1ft (0.3m)3s
Evening (11 Aug)0.5ft (0.1m)11s

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


Short Range Forecast

Mostly dry. Warm (max 25°C on Wed afternoon, min 17°C on Thu night). Wind will be generally light.

Tuesday
11
Wednesday
12
Thursday
13
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
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)
0.2
SSW
6
0.2
SSW
6
0.2
SSW
6
0.3
S
6
0.3
SSW
3
0.1
SW
6
0.1
S
11
0.1
S
11
0.1
SW
11
0.1
SW
12
0.1
SW
12
0.1
SW
10
0.1
SW
12
0.1
SW
12
0.1
SW
12
0.1
SW
10
0.1
SW
10
0.1
SW
10
0.1
SW
10
0.1
SW
10
0.1
SW
11
0.4
SSW
3
0.7
SW
4
Wave Graph
Metric surfscale
Energy kJ
4
4
4
7
2
1
5
2
5
5
6
4
6
6
5
4
4
4
4
4
4
4
17
Wind (km/h)
15
ENE
10
E
10
SSW
20
SSW
15
WSW
10
SSW
5
SE
10
SE
10
S
10
S
15
S
15
SSW
10
WSW
5
NNW
5
E
5
S
10
S
10
S
10
SSW
10
SW
15
SW
5
W
10
S
Wind State
cross-off
cross-off
cross-on
on
on
on
cross
cross
cross-on
cross-on
cross-on
on
cross-on
cross-off
cross-off
cross-on
cross-on
cross-on
on
on
on
cross-on
cross-on
High Tide
8:49AM3.66m
9:07PM4.05m
9:40AM3.86m
9:54PM4.35m
10:25AM4.00m
Low Tide
3:34PM0.38m
4:04AM-0.04m
4:20PM0.13m
4:50AM-0.29m
5:04PM-0.02m
part cloud
clear
clear
part cloud
part cloud
clear
clear
clear
cloud
cloud
part cloud
part cloud
clear
clear
clear
part cloud
clear
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>
5:50
5:52
5:52
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:54
8:52
8:50
 mm
Temp °C
16
16
18
21
21
20
20
20
20
20
21
23
25
24
24
23
21
21
21
22
22
21
20
Feels °C
14
14
15
17
18
19
19
19
19
18
18
20
22
22
23
22
19
20
20
22
21
21
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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