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 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.3°C
1.8° 

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 (05 Sep):

  • Morning surf: Morning surf (05 Sep, local time) - 3ft (0.9m), 5s period with WSW swell.
  • Afternoon surf: Afternoon surf (05 Sep, local time) - 1.5ft (0.5m), 6s period with SW swell.
  • Evening surf: Evening surf (05 Sep, local time) - 2ft (0.6m), 4s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 9PM is: 0.6m 4s primary swell from a Southwest direction and 0.1m 13s secondary swell from a Southwest direction (forecast issued at 12:00pm September 05). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (05 Sep)3ft (0.9m)5s
Afternoon (05 Sep)1.5ft (0.5m)6s
Evening (05 Sep)2ft (0.6m)4s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Mon night. Very mild (max 19°C on Sun afternoon, min 13°C on Mon night). Winds increasing (light winds from the WSW on Sat morning, fresh winds from the S by Sun morning).

Sat
5
Sunday
6
Monday
7
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
WSW
5
0.8
WSW
4
0.5
SW
6
0.6
SW
4
0.6
SW
4
0.9
SSW
4
1.2
SSW
5
1.3
SSW
5
1.4
SSW
6
1.5
SSW
6
1.6
SSW
6
1.7
SSW
6
1.7
SSW
6
1.4
SW
6
0.9
SSW
6
0.9
WSW
6
0.3
SW
14
1.2
SW
5
1.6
SW
6
1.6
SW
6
1.4
SW
6
Wave Graph
Metric surfscale
Energy kJ
30
26
16
10
14
28
59
86
115
131
156
223
223
152
59
55
33
63
165
178
151
Wind (km/h)
20
W
15
WSW
20
SW
20
SSW
20
S
25
S
30
S
30
S
30
S
35
S
35
SSW
30
SSW
30
SSW
25
WSW
20
W
20
W
20
SW
30
SW
35
SSW
35
SW
25
WSW
Wind State
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
on
on
cross-on
High Tide
4:06PM3.08m
5:04AM3.02m
5:48PM3.13m
6:46AM3.12m
7:12PM3.41m
Low Tide
10:40AM1.25m
11:26PM1.19m
12:11PM1.26m
00:57AM0.99m
1:29PM1.03m
clear
clear
part cloud
part cloud
cloud
cloud
cloud
light rain
rain showers
part cloud
part cloud
cloud
part cloud
cloud
cloud
clear
cloud
part cloud
part cloud
light rain
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:33
6:35
6:35
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:59
7:55
7:53
 mm
1
1
2
3
Temp °C
14
14
14
14
14
15
15
14
14
18
19
18
17
16
15
15
15
15
16
16
15
Feels °C
10
11
10
10
10
10
10
9
9
11
13
14
13
13
12
12
11
9
10
10
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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