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 pm 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.1°C
1.6° 

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 (08 Sep):

  • Morning surf: Morning surf (08 Sep, local time) - 5ft (1.5m), 5s period with W swell.
  • Afternoon surf: Afternoon surf (08 Sep, local time) - 5ft (1.6m), 5s period with WNW swell.
  • Evening surf: Evening surf (08 Sep, local time) - 1.5ft (0.5m), 6s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 1AM is: 1.8m 7s primary swell from a Southwest direction and 0.1m 12s secondary swell from a Southwest direction (forecast issued at 06:00pm September 07). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (08 Sep)5ft (1.5m)5s
Afternoon (08 Sep)5ft (1.6m)5s
Evening (08 Sep)1.5ft (0.5m)6s

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 16°C on Mon afternoon, min 12°C on Tue night). Winds decreasing (fresh winds from the SSW on Mon afternoon, light winds from the WSW by Wed afternoon).

Mon
7
Tuesday
8
Wednesday
9
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
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.6
SW
5
2.1
SW
6
2.1
SW
7
1.8
SW
7
1.6
WSW
6
1.5
WSW
5
1.5
W
5
1.5
W
5
1.6
WNW
5
1.3
WNW
5
0.5
SW
6
0.4
SW
6
0.4
SW
6
0.3
SW
6
0.4
SW
8
0.4
SW
8
0.4
SW
7
0.3
SW
7
0.5
SW
7
Wave Graph
Metric surfscale
Energy kJ
133
328
382
292
215
117
120
120
138
87
16
9
9
5
15
14
14
9
27
Wind (km/h)
40
SSW
40
WSW
25
WSW
30
WSW
25
W
25
W
35
W
35
W
30
WNW
35
NW
35
NW
30
NW
30
NW
20
NNW
20
NW
20
WNW
15
WSW
15
SSW
20
SSW
Wind State
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
cross
cross
cross-off
cross
cross
on
on
cross-on
High Tide
7:12PM3.41m
7:58AM3.37m
8:11PM3.77m
8:48AM3.63m
8:58PM4.11m
Low Tide
1:29PM1.03m
2:07AM0.62m
2:30PM0.70m
3:02AM0.22m
3:19PM0.38m
part cloud
light rain
light rain
light rain
part cloud
part cloud
clear
cloud
rain showers
clear
clear
clear
clear
clear
cloud
clear
clear
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:37
6:39
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:53
7:52
7:49
 mm
2
4
1
1
Temp °C
16
16
15
14
14
13
13
14
15
16
14
13
13
12
13
13
14
14
14
Feels °C
10
10
11
9
9
7
6
7
9
9
7
7
7
7
9
9
11
10
9
  • 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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