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 17 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
18.1° C
2.3° 

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 (17 Aug):

  • Morning surf: Morning surf (17 Aug, local time) - 1.5ft (0.4m), 4s period with SW swell.
  • Afternoon surf: Afternoon surf (17 Aug, local time) - 1ft (0.3m), 5s period with SW swell.
  • Evening surf: Evening surf (17 Aug, local time) - 2ft (0.6m), 4s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 7PM is: 0.3m 5s primary swell from a Southwest direction and 0.2m 3s secondary swell from a West-northwest direction (forecast issued at 12:00pm August 17). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (17 Aug)1.5ft (0.4m)4s
Afternoon (17 Aug)1ft (0.3m)5s
Evening (17 Aug)2ft (0.6m)4s

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


Short Range Forecast

Light rain (total 8mm), mostly falling on Mon night. Very mild (max 18°C on Mon night, min 14°C on Tue night). Mainly fresh winds.

Mon
17
Tuesday
18
Wednesday
19
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)
0.4
SW
5
0.4
SW
5
0.3
SW
5
0.3
SW
5
0.8
SSW
4
0.8
SW
4
0.8
WSW
4
0.6
SW
5
0.9
WSW
4
0.6
SW
6
0.5
SW
6
0.5
SW
6
0.6
WSW
3
0.9
WSW
4
1
WSW
4
1
WSW
4
1.1
SW
5
1.2
SW
5
1.1
SW
5
1.2
SW
6
1.3
SW
6
Wave Graph
Metric surfscale
Energy kJ
6
6
4
4
14
22
26
18
31
23
17
16
9
24
37
35
49
74
63
89
124
Wind (km/h)
10
WNW
5
W
10
W
15
S
30
SSW
20
WSW
25
WNW
20
WNW
20
W
20
W
15
SW
15
SW
20
WSW
25
W
25
WSW
25
WSW
30
SW
30
SW
25
SSW
20
SW
15
WSW
Wind State
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
cross-on
High Tide
1:04PM3.73m
1:21AM3.95m
1:44PM3.51m
2:05AM3.58m
2:29PM3.25m
Low Tide
7:34AM0.15m
7:45PM0.46m
8:13AM0.53m
8:25PM0.77m
8:54AM0.92m
9:10PM1.10m
cloud
cloud
cloud
cloud
light rain
light rain
cloud
cloud
cloud
cloud
cloud
cloud
cloud
rain showers
clear
clear
part cloud
cloud
light rain
light rain
rain showers
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:01
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:42
8:39
8:37
 mm
1
1
1
1
1
1
Temp °C
16
16
16
16
16
18
17
16
16
16
17
18
17
16
15
14
15
16
16
16
16
Feels °C
16
16
15
14
12
17
14
13
13
13
14
15
13
12
11
9
9
10
11
13
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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