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 30 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 (30 Aug):

  • Afternoon surf: Afternoon surf (30 Aug, local time) - 3.5ft (1.1m), 5s period with SSW swell.
  • Evening surf: Evening surf (30 Aug, local time) - 4ft (1.2m), 7s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 10PM is: 1.2m 7s primary swell from a Southwest direction (forecast issued at 06:00pm August 30). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (30 Aug)--
Afternoon (30 Aug)3.5ft (1.1m)5s
Evening (30 Aug)4ft (1.2m)7s

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


Short Range Forecast

Moderate rain (total 11mm), heaviest on Sun afternoon. Very mild (max 17°C on Tue afternoon, min 15°C on Sun night). Winds increasing (light winds from the SW on Sun night, fresh winds from the SSW by Wed morning).

Sun
30
Monday
31
Tuesday
1
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)
1.1
SSW
5
1.1
SSW
5
1.2
SW
7
1.1
SW
7
0.9
SSW
8
0.8
SSW
8
1.3
WNW
5
1.2
WNW
5
0.6
SW
8
0.6
SSW
8
0.5
SW
8
0.4
SSW
7
0.7
WSW
4
0.8
WSW
4
0.8
WSW
4
0.9
SW
4
1.2
SSW
5
1.3
SSW
5
1.4
SW
5
Wave Graph
Metric surfscale
Energy kJ
50
71
151
119
98
76
87
67
50
42
28
21
11
16
18
26
61
94
106
Wind (km/h)
30
S
20
S
15
S
10
SW
25
WNW
30
NW
30
WNW
30
WNW
25
WNW
15
W
15
WSW
15
WSW
20
SW
20
SW
25
SW
25
SW
30
SW
30
SW
25
WSW
Wind State
cross-on
cross-on
cross-on
on
cross-on
cross
cross
cross
cross
cross-on
cross-on
on
on
on
on
on
on
on
on
High Tide
11:30PM4.30m
11:49AM3.93m
00:03AM4.23m
12:23PM3.87m
Low Tide
6:01PM0.20m
6:27AM0.05m
6:37PM0.27m
7:03AM0.19m
7:16PM0.42m
light rain
thunderstorm
part cloud
cloud
clear
part cloud
part cloud
part cloud
cloud
cloud
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:24
6:26
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:13
8:09
8:07
 mm
2
2
1
2
Temp °C
16
16
15
15
15
15
15
15
15
16
16
16
15
15
15
16
17
17
17
Feels °C
12
13
13
13
12
10
10
9
10
13
13
13
11
12
11
12
12
13
14
  • 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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