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 19 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 (19 Aug):

  • Morning surf: Morning surf (19 Aug, local time) - 2.5ft (0.8m), 4s period with WSW swell.
  • Afternoon surf: Afternoon surf (19 Aug, local time) - 2.5ft (0.8m), 4s period with SSW swell.
  • Evening surf: Evening surf (19 Aug, local time) - 3.5ft (1.1m), 5s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 9AM is: 0.8m 4s primary swell from a West-southwest direction and 0.1m 16s secondary swell from a Southwest direction, 0.1m 16s secondary swell from a Southwest direction (forecast issued at 12:00am August 19). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (19 Aug)2.5ft (0.8m)4s
Afternoon (19 Aug)2.5ft (0.8m)4s
Evening (19 Aug)3.5ft (1.1m)5s

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


Short Range Forecast

Moderate rain (total 15mm), heaviest on Tue night. Very mild (max 16°C on Wed morning, min 12°C on Thu night). Mainly fresh winds.

Wednesday
19
Thursday
20
Friday
21
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)
0.8
WSW
4
0.9
WSW
4
0.9
WSW
4
0.8
WSW
4
0.7
WSW
4
0.8
SSW
4
1.1
SW
5
1.1
SW
5
0.9
SW
5
0.8
SW
5
0.6
SW
5
0.5
SW
6
0.4
SW
7
0.4
SW
7
0.3
SW
6
0.3
SW
6
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.1
SW
13
0.2
W
3
0.1
SW
13
Wave Graph
Metric surfscale
Energy kJ
18
23
31
24
16
18
61
71
42
34
23
21
15
11
8
8
8
8
7
7
7
7
1
7
Wind (km/h)
20
WSW
15
WSW
15
W
20
W
20
SW
30
SSW
30
SSW
15
WSW
20
W
20
WNW
20
WNW
25
N
30
NNE
30
N
20
N
15
N
20
N
15
NNW
10
NNW
20
NW
20
NNW
20
NNW
20
N
15
N
Wind State
on
on
cross-on
cross-on
on
on
on
cross-on
cross-on
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross-off
cross-off
cross-off
cross-off
High Tide
2:05AM3.58m
2:29PM3.25m
2:56AM3.21m
3:26PM3.00m
4:05AM2.90m
4:46PM2.83m
Low Tide
8:54AM0.92m
9:10PM1.10m
9:40AM1.27m
10:08PM1.38m
10:45AM1.54m
light rain
rain showers
light rain
rain showers
clear
clear
light rain
rain showers
rain showers
rain showers
light rain
thunderstorm
light rain
part cloud
clear
clear
part cloud
cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:05
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:36
8:32
 mm
2
1
1
1
1
1
1
1
2
2
1
Temp °C
14
15
14
15
16
16
16
15
15
14
14
15
14
15
15
14
13
12
12
13
14
15
15
14
Feels °C
11
13
12
11
13
11
11
13
12
11
11
11
8
9
10
11
9
9
10
9
10
11
11
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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