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 17 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
16.3°C
1.1° 

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 (17 Sep):

  • Morning surf: Morning surf (17 Sep, local time) - 5.5ft (1.7m), 6s period with W swell.
  • Afternoon surf: Afternoon surf (17 Sep, local time) - 5.5ft (1.7m), 6s period with W swell.
  • Evening surf: Evening surf (17 Sep, local time) - 5ft (1.6m), 6s period with W swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 5AM is: 1.8m 6s primary swell from a Southwest direction (forecast issued at 12:00am September 17). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 Sep)5.5ft (1.7m)6s
Afternoon (17 Sep)5.5ft (1.7m)6s
Evening (17 Sep)5ft (1.6m)6s

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


Short Range Forecast

Moderate rain (total 13mm), heaviest on Fri afternoon. Very mild (max 17°C on Fri afternoon, min 13°C on Wed night). Mainly strong winds.

Thursday
17
Friday
18
Saturday
19
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)
1.7
SW
6
1.8
SW
6
1.3
SW
7
1.7
W
6
1.6
W
6
1.7
W
6
1.6
W
6
1.6
W
6
1.5
W
6
1.4
W
5
1.3
W
5
1.2
SW
5
1.8
SW
6
2.5
SW
7
2.4
SW
7
2.1
SW
7
2.3
SW
7
2.3
SW
7
2.3
SW
7
2.1
SW
7
1.7
SW
7
1.4
SW
7
1.2
SW
7
1
SW
7
Wave Graph
Metric surfscale
Energy kJ
177
239
140
180
154
178
152
154
134
104
92
71
217
662
606
459
508
522
558
452
301
194
143
102
Wind (km/h)
35
SW
35
WSW
30
WNW
30
W
35
W
30
W
30
W
35
W
30
W
30
W
25
WSW
30
SW
40
SSW
45
SW
35
SW
35
SW
35
SW
35
SW
35
WSW
30
WSW
30
WSW
25
W
25
W
25
W
Wind State
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
1:24AM3.48m
1:40PM3.31m
2:09AM3.11m
2:30PM3.01m
3:16AM2.79m
3:54PM2.78m
Low Tide
8:09AM1.03m
8:30PM1.08m
8:52AM1.36m
9:24PM1.38m
9:52AM1.62m
light rain
rain showers
clear
clear
cloud
part cloud
clear
clear
clear
part cloud
part cloud
cloud
light rain
mod rain
light rain
cloud
part cloud
cloud
cloud
clear
cloud
part cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:30
7:27
7:24
 mm
2
1
1
8
1
Temp °C
14
15
13
14
14
15
15
14
13
14
14
14
14
15
17
17
16
16
17
16
16
16
16
15
Feels °C
8
9
7
8
6
9
9
7
7
8
10
8
6
8
12
12
11
11
12
11
11
11
11
10
  • 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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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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