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 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.0°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 (11 Sep):

  • Afternoon surf: Afternoon surf (11 Sep, local time) - 7ft (2.2m), 7s period with SSW swell.
  • Evening surf: Evening surf (11 Sep, local time) - 5ft (1.5m), 7s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 12AM is: 1.1m 7s primary swell from a Southwest direction and 0.5m 4s secondary swell from a West-northwest direction (forecast issued at 06:00pm September 10). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (11 Sep)--
Afternoon (11 Sep)7ft (2.2m)7s
Evening (11 Sep)5ft (1.5m)7s

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


Short Range Forecast

Light rain (total 7mm), mostly falling on Thu afternoon. Very mild (max 18°C on Sat night, min 14°C on Thu night). Winds decreasing (fresh winds from the SSW on Thu afternoon, light winds from the WNW by Fri afternoon).

Thu
10
Friday
11
Saturday
12
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)
2.2
SSW
7
1.7
SW
7
1.4
SW
7
1.1
SW
7
0.9
SSW
7
0.8
SW
6
0.7
SW
6
0.6
SSW
6
0.5
SW
6
0.4
SSW
6
0.4
SSW
6
0.9
SSW
4
1.4
SW
5
1.8
SW
6
2.1
SW
6
2.2
SW
7
2.2
SW
7
1.9
SW
7
1.5
SW
7
Wave Graph
Metric surfscale
Energy kJ
458
268
168
103
76
51
43
27
19
15
15
25
110
229
348
412
447
305
198
Wind (km/h)
40
SSW
25
SW
25
WSW
20
W
15
W
20
WNW
15
WNW
15
WNW
10
WNW
10
SSW
15
S
25
SSW
35
SSW
35
SSW
40
SSW
35
SSW
30
SW
25
SSW
20
SW
Wind State
on
on
cross-on
cross-on
cross-on
cross
cross
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
High Tide
9:39PM4.37m
10:06AM4.03m
10:17PM4.51m
10:42AM4.11m
Low Tide
4:02PM0.12m
4:31AM-0.30m
4:43PM-0.03m
5:10AM-0.34m
5:22PM-0.06m
rain showers
light rain
cloud
clear
clear
cloud
cloud
part cloud
clear
clear
clear
part cloud
cloud
light rain
light rain
light rain
cloud
cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:45
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:46
7:44
7:42
 mm
2
1
1
1
2
Temp °C
17
17
17
16
15
14
14
14
14
14
14
14
14
15
16
16
16
17
17
Feels °C
12
13
13
13
13
11
11
11
12
12
11
9
7
9
10
11
12
14
16
  • 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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