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 23 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.8°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 (23 Aug):

  • Morning surf: Morning surf (23 Aug, local time) - 0.5ft (0.1m), 15s period with SW swell.
  • Afternoon surf: Afternoon surf (23 Aug, local time) - 0.5ft (0.1m), 14s period with SW swell.
  • Evening surf: Evening surf (23 Aug, local time) - 0.5ft (0.1m), 13s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 4PM is: 0.1m 14s primary swell from a Southwest direction (forecast issued at 12:00pm August 23). An open ocean swell of 0.3m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (BST) & DateWave HeightWave Period
Morning (23 Aug)0.5ft (0.1m)15s
Afternoon (23 Aug)0.5ft (0.1m)14s
Evening (23 Aug)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 4mm), mostly falling on Tue night. Warm (max 23°C on Tue afternoon, min 14°C on Sun morning). Winds increasing (calm on Mon morning, fresh winds from the E by Tue night).

Sun
23
Monday
24
Tuesday
25
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)
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.1
SW
13
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.2
SSW
9
Wave Graph
Metric surfscale
Energy kJ
8
8
7
7
7
7
8
8
8
8
7
7
7
7
7
7
7
7
7
7
7
Wind (km/h)
10
N
15
N
20
N
15
NNE
15
NE
15
ENE
10
E
10
ENE
5
SSW
10
WNW
10
NNE
20
ENE
20
E
20
E
15
ENE
20
ENE
20
ENE
20
E
20
ENE
20
ENE
35
E
Wind State
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
cross-off
glassy
cross-on
cross-off
off
cross-off
cross-off
off
off
cross-off
cross-off
off
off
cross-off
High Tide
7:04AM2.82m
7:32PM3.02m
8:05AM2.99m
8:24PM3.28m
8:49AM3.20m
9:03PM3.55m
Low Tide
1:41PM1.46m
2:17AM1.25m
2:33PM1.20m
3:02AM0.96m
3:12PM0.93m
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
part cloud
clear
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:11
6:11
6:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:29
8:27
8:23
 mm
Temp °C
14
15
16
15
14
15
16
17
18
19
20
19
19
16
14
14
16
21
23
23
20
Feels °C
12
12
13
12
11
12
14
14
17
17
18
14
15
12
10
11
13
17
19
19
13
  • 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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