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 28 Aug 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.5°C
1.9° 

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 (28 Aug):

  • Morning surf: Morning surf (28 Aug, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Afternoon surf: Afternoon surf (28 Aug, local time) - 1.5ft (0.4m), 6s period with SSW swell.
  • Evening surf: Evening surf (28 Aug, local time) - 2.5ft (0.8m), 6s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 9AM is: 0.4m 6s primary swell from a South-southwest direction and 0.1m 12s secondary swell from a South direction (forecast issued at 12:00am August 28). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (28 Aug)1.5ft (0.4m)6s
Afternoon (28 Aug)1.5ft (0.4m)6s
Evening (28 Aug)2.5ft (0.8m)6s

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


Short Range Forecast

Moderate rain (total 19mm), heaviest on Sat morning. Very mild (max 18°C on Sat morning, min 15°C on Sat night). Winds increasing (light winds from the NNE on Thu night, fresh winds from the S by Sun afternoon).

Friday
28
Saturday
29
Sunday
30
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)
0.2
SSW
7
0.3
SSW
6
0.4
SSW
6
0.4
SSW
6
0.4
SSW
6
0.4
SSW
6
0.7
SSW
6
0.8
SSW
6
0.9
SSW
6
1
SSW
6
1.1
SSW
6
0.9
SSW
6
1.1
SSW
6
1.3
SSW
6
1
SSW
7
1.8
NW
6
1.1
SW
9
1
SW
9
0.9
SW
9
0.8
SSW
8
1
SSW
8
1.2
SSW
5
1.4
SSW
6
1.3
SSW
6
Wave Graph
Metric surfscale
Energy kJ
4
8
16
16
16
16
34
49
56
64
85
62
95
145
99
222
182
155
112
92
128
64
145
130
Wind (km/h)
10
S
10
SW
10
WSW
15
WNW
10
W
15
WSW
20
SSW
20
SSW
25
SSW
25
SSW
10
SSE
20
ENE
15
SSW
25
SW
20
WNW
25
NW
20
W
15
SW
15
SSW
25
S
30
S
35
S
30
S
25
SSW
Wind State
cross-on
on
cross-on
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross
cross-off
cross-on
on
cross
cross
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
10:04PM4.02m
10:23AM3.73m
10:32PM4.18m
10:51AM3.84m
11:00PM4.28m
11:19AM3.92m
Low Tide
4:45AM0.20m
4:53PM0.30m
5:18AM0.06m
5:26PM0.21m
5:52AM0.00m
6:01PM0.20m
light rain
part cloud
cloud
light rain
rain showers
clear
clear
clear
part cloud
cloud
light rain
mod rain
rain showers
cloud
cloud
light rain
clear
clear
clear
part cloud
cloud
light rain
thunderstorm
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:20
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:15
8:13
 mm
3
2
1
1
6
1
1
2
1
3
Temp °C
16
16
16
16
17
17
17
17
16
16
16
16
18
17
16
15
15
15
15
17
18
16
16
15
Feels °C
16
16
16
15
17
15
15
15
13
13
15
14
17
14
14
11
12
13
13
14
13
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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