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 31 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.6°C
2.0° 

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 (01 Sep):

  • Morning surf: Morning surf (01 Sep, local time) - 2.5ft (0.8m), 4s period with SW swell.
  • Afternoon surf: Afternoon surf (01 Sep, local time) - 3.5ft (1.1m), 5s period with SW swell.
  • Evening surf: Evening surf (01 Sep, local time) - 3.5ft (1.1m), 5s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 2AM is: 0.4m 7s primary swell from a South-southwest direction and 0.5m 3s secondary swell from a West direction (forecast issued at 06:00pm August 31). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (01 Sep)2.5ft (0.8m)4s
Afternoon (01 Sep)3.5ft (1.1m)5s
Evening (01 Sep)3.5ft (1.1m)5s

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


Short Range Forecast

Light rain (total 4mm), mostly falling on Tue night. Very mild (max 18°C on Wed afternoon, min 15°C on Mon night). Winds increasing (light winds from the W on Tue night, fresh winds from the S by Wed morning).

Mon
31
Tuesday
1
Wednesday
2
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
1
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)
0.6
SW
8
0.6
SSW
8
0.5
SW
7
0.4
SSW
7
0.7
WSW
7
0.7
SW
4
0.8
SW
4
0.9
SW
4
1.2
SSW
5
1.4
SW
5
1.1
SW
5
0.9
SW
5
0.7
SW
5
0.7
SW
5
1
SSW
5
1.6
SSW
6
1.6
SSW
6
1.4
SW
6
1.3
SSW
6
Wave Graph
Metric surfscale
Energy kJ
50
41
27
21
46
12
23
31
61
98
64
38
25
24
40
148
184
152
137
Wind (km/h)
20
W
15
WNW
10
W
15
W
20
SW
25
SSW
25
SW
30
SW
30
SW
30
SW
10
W
10
SSW
15
SSW
20
SSW
30
S
35
S
30
SSW
30
SSW
25
SSW
Wind State
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
00:03AM4.23m
12:23PM3.87m
00:40AM4.07m
1:01PM3.73m
Low Tide
6:37PM0.27m
7:03AM0.19m
7:16PM0.42m
7:43AM0.43m
7:59PM0.63m
cloud
cloud
part cloud
clear
clear
clear
clear
cloud
cloud
light rain
light rain
cloud
cloud
cloud
part cloud
light rain
part cloud
part cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:28
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:09
8:07
8:06
 mm
1
2
1
Temp °C
16
17
16
15
15
15
15
16
17
17
17
16
16
16
16
16
18
17
17
Feels °C
12
14
14
12
12
11
11
12
12
12
17
15
14
13
12
10
14
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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