Cable Bay (Porth Trecastell) Surf Break

Lat Long: 53.22° N 4.51° W

Cable Bay (Porth Trecastell) 48 hour detailed Surf Forecast

Issued: 6 am 14 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.9° C
2.2° 

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 (14 Aug):

  • Morning surf: Morning surf (14 Aug, local time) - 1.5ft (0.5m), 4s period with SW swell.
  • Afternoon surf: Afternoon surf (14 Aug, local time) - 1.5ft (0.4m), 5s period with SW swell.
  • Evening surf: Evening surf (14 Aug, local time) - 0.5ft (0.2m), 4s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 12PM is: 0.4m 4s primary swell from a Southwest direction (forecast issued at 06:00am August 14). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (14 Aug)1.5ft (0.5m)4s
Afternoon (14 Aug)1.5ft (0.4m)5s
Evening (14 Aug)0.5ft (0.2m)4s

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


Short Range Forecast

Some drizzle, heaviest during Fri morning. Very mild (max 18°C on Fri morning, min 13°C on Sat night). Wind will be generally light.

Friday
14
Saturday
15
Sunday
16
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
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
SSW
4
0.5
SW
4
0.4
SSW
4
0.4
SW
5
0.3
SW
5
0.2
SSW
4
0.2
SSW
4
0.1
SW
6
0.1
SW
6
0.1
SW
8
0.1
W
8
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
6
0.1
SW
7
0.2
N
4
0.2
N
4
0.2
N
4
0.4
SW
3
Wave Graph
Metric surfscale
Energy kJ
12
9
7
5
3
2
2
1
1
2
1
1
1
2
1
1
1
2
0
0
0
0
2
Wind (km/h)
15
S
15
S
10
SW
15
N
15
N
15
N
15
NNE
10
N
15
N
20
NNW
20
NNW
20
NNW
20
NW
15
NNE
10
NNE
10
NE
5
ENE
5
ENE
5
SSE
15
SW
15
SW
20
SSW
20
S
Wind State
cross-on
cross-on
on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
glassy
off
glassy
on
on
cross-on
cross-on
High Tide
11:07AM4.05m
11:19PM4.59m
11:46AM4.02m
00:00AM4.50m
12:25PM3.91m
Low Tide
5:45PM-0.06m
6:15AM-0.35m
6:25PM0.02m
6:55AM-0.16m
7:05PM0.20m
part cloud
part cloud
cloud
light rain
cloud
part cloud
part cloud
cloud
clear
clear
part cloud
clear
clear
clear
clear
part cloud
cloud
cloud
cloud
part cloud
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:56
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:47
8:45
8:44
 mm
1
Temp °C
17
17
18
16
16
18
17
16
15
14
15
15
15
17
14
14
13
13
14
15
15
16
16
Feels °C
16
17
19
15
14
16
15
14
12
11
11
11
12
14
12
13
12
12
13
12
12
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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