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 29 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.8°C
2.2° 

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 (29 Aug):

  • Morning surf: Morning surf (29 Aug, local time) - 2.5ft (0.8m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (29 Aug, local time) - 2.5ft (0.7m), 6s period with SSW swell.
  • Evening surf: Evening surf (29 Aug, local time) - 2.5ft (0.8m), 7s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 5AM is: 0.8m 6s primary swell from a South-southwest direction and 0.1m 11s secondary swell from a South direction (forecast issued at 12:00am August 29). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (29 Aug)2.5ft (0.8m)6s
Afternoon (29 Aug)2.5ft (0.7m)6s
Evening (29 Aug)2.5ft (0.8m)7s

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


Short Range Forecast

Moderate rain (total 10mm), heaviest on Sat morning. Very mild (max 17°C on Fri night, min 13°C on Mon morning). Winds increasing (light winds from the WSW on Sat night, fresh winds from the S by Sun afternoon).

Saturday
29
Sunday
30
Monday
31
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
1
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
SSW
6
0.8
SSW
6
0.8
SSW
6
0.8
SSW
6
0.7
SSW
6
0.7
SSW
6
0.7
SSW
6
0.9
SSW
8
1
SSW
9
0.9
SW
9
0.8
SW
9
0.6
SW
8
1
SSW
4
1.4
SSW
6
1.4
SSW
6
1.2
SW
7
1.1
SW
7
1
SW
8
1
SW
8
1.5
WNW
6
0.8
SW
8
0.6
SW
8
0.7
SW
7
0.4
SSW
7
Wave Graph
Metric surfscale
Energy kJ
47
44
47
44
34
33
34
103
165
118
93
57
34
126
155
156
136
116
122
138
71
48
56
21
Wind (km/h)
15
SSW
20
SSW
15
SSE
10
SSE
10
NNE
15
NNE
10
N
10
NW
10
WSW
15
SSW
15
SSW
25
S
25
S
35
S
25
SSW
20
SSW
15
WSW
30
WNW
35
WNW
35
NW
25
WNW
15
SW
20
SSW
15
SW
Wind State
on
cross-on
cross-on
cross
off
cross-off
cross-off
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross
cross
cross
cross
on
cross-on
on
High Tide
10:32PM4.18m
10:51AM3.84m
11:00PM4.28m
11:19AM3.92m
11:30PM4.30m
11:49AM3.93m
Low Tide
5:18AM0.06m
5:26PM0.21m
5:52AM0.00m
6:01PM0.20m
6:27AM0.05m
6:37PM0.27m
clear
cloud
cloud
light rain
light rain
rain showers
part cloud
cloud
cloud
part cloud
clear
light rain
light rain
thunderstorm
thunderstorm
part cloud
clear
part cloud
cloud
part cloud
clear
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:22
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:15
8:13
8:09
 mm
1
2
1
1
2
2
1
Temp °C
16
16
16
16
16
16
16
15
15
15
15
17
17
17
16
15
15
15
15
13
15
15
16
17
Feels °C
14
14
15
15
16
15
15
14
15
13
13
13
13
12
12
12
13
10
9
6
10
11
12
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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