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 21 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
16.4°C
1.3° 

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 (21 Sep):

  • Morning surf: Morning surf (21 Sep, local time) - 2.5ft (0.8m), 4s period with SSW swell.
  • Afternoon surf: Afternoon surf (21 Sep, local time) - 1.5ft (0.4m), 4s period with SSW swell.
  • Evening surf: Evening surf (21 Sep, local time) - 0.5ft (0.1m), 13s period with S swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 6AM is: 0.8m 4s primary swell from a South-southwest direction (forecast issued at 12:00am September 21). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (21 Sep)2.5ft (0.8m)4s
Afternoon (21 Sep)1.5ft (0.4m)4s
Evening (21 Sep)0.5ft (0.1m)13s

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


Short Range Forecast

Light rain (total 2mm), mostly falling on Tue night. Very mild (max 18°C on Mon afternoon, min 12°C on Wed morning). Mainly fresh winds.

Monday
21
Tuesday
22
Wednesday
23
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)
0.6
SW
4
0.7
SW
4
0.8
SSW
4
0.8
SSW
4
0.6
SSW
4
0.4
SSW
4
0.4
SSW
4
0.1
S
13
0.5
SSW
4
0.6
SSW
4
0.4
SSW
4
0.4
SSW
4
0.4
SW
4
0.1
S
12
0.1
S
12
0.1
S
12
0.1
SW
17
0.1
SW
16
0.1
SW
15
0.1
SW
15
0.1
SW
14
0.1
W
13
0.1
SW
12
0.1
SW
12
Wave Graph
Metric surfscale
Energy kJ
12
15
18
19
10
6
5
4
7
10
6
5
3
3
3
3
12
10
9
8
8
6
6
6
Wind (km/h)
15
S
20
S
25
S
20
S
20
S
15
S
15
S
15
S
20
SSE
15
S
15
S
20
S
15
SSW
15
SSW
15
SSW
15
S
15
SSE
5
WSW
20
NNW
30
N
30
N
30
NNW
25
N
10
NNE
Wind State
cross-on
cross-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
cross-on
cross-on
on
cross-off
cross-off
cross-off
cross-off
cross-off
off
High Tide
6:48AM2.73m
7:09PM3.00m
7:45AM2.94m
7:57PM3.28m
8:24AM3.18m
8:32PM3.56m
Low Tide
00:33AM1.54m
1:01PM1.56m
1:44AM1.28m
1:57PM1.28m
2:29AM0.97m
2:38PM0.99m
part cloud
part cloud
cloud
cloud
part cloud
clear
clear
clear
clear
clear
clear
cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
cloud
cloud
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:01
7:01
7:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:20
7:17
7:15
 mm
1
1
Temp °C
14
14
14
14
16
17
18
18
17
16
16
17
17
18
18
18
17
16
13
12
13
14
13
13
Feels °C
11
10
10
11
14
16
17
16
15
14
15
15
16
17
17
17
15
16
10
6
7
8
8
11
  • 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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