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 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
17.0°C
1.7° 

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 (12 Sep):

  • Afternoon surf: Afternoon surf (12 Sep, local time) - 6.5ft (2.0m), 7s period with SW swell.
  • Evening surf: Evening surf (12 Sep, local time) - 5ft (1.6m), 7s period with SW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 11PM is: 1.1m 7s primary swell from a Southwest direction and 0.4m 4s secondary swell from a Northwest direction (forecast issued at 06:00pm September 12). The wind direction is predicted to be glassy.

Time (BST) & DateWave HeightWave Period
Morning (12 Sep)--
Afternoon (12 Sep)6.5ft (2.0m)7s
Evening (12 Sep)5ft (1.6m)7s

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


Short Range Forecast

Moderate rain (total 19mm), heaviest on Mon night. Very mild (max 18°C on Sat afternoon, min 14°C on Mon night). Winds increasing (calm on Sat night, fresh winds from the SSW by Mon afternoon).

Sat
12
Sunday
13
Monday
14
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
1
1
1
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)
1.9
SW
7
1.5
SW
7
1.2
SW
7
0.9
SSW
7
0.8
SSW
6
0.7
SW
6
0.6
SSW
6
0.5
SW
6
0.5
SW
6
0.4
SSW
6
0.4
SW
6
0.5
SSW
6
0.6
SSW
4
0.6
SSW
4
0.9
SSW
4
1
SSW
5
1.3
SSW
5
1.7
SSW
6
1.7
SSW
6
Wave Graph
Metric surfscale
Energy kJ
314
198
131
76
52
39
25
17
17
14
9
18
8
11
30
48
86
209
223
Wind (km/h)
35
SW
20
SW
5
WSW
5
ESE
10
WSW
5
NW
5
W
10
W
10
WSW
10
SSW
15
S
20
S
25
SSW
15
S
25
SSW
30
SSW
30
S
35
SSW
35
SSW
Wind State
on
on
on
glassy
cross-on
cross
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
10:54PM4.52m
11:16AM4.11m
11:30PM4.39m
11:50AM4.02m
Low Tide
5:22PM-0.06m
5:48AM-0.24m
5:59PM0.01m
6:23AM-0.01m
6:35PM0.19m
part cloud
part cloud
cloud
cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
cloud
part cloud
light rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:47
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:42
7:38
7:37
 mm
1
Temp °C
18
18
18
17
17
16
16
17
17
17
16
16
16
17
16
16
17
17
17
Feels °C
14
16
18
18
17
16
16
17
17
17
15
14
14
16
13
12
13
13
12
  • 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 

Eyeball surf reportRecent Eyeball Surf Reports for Wales - Anglesy

  1. West Coast Surf: ‘Porth Neigwl: Choppy waves hadn't tidied much (from what I could see in the dark.’

    Hells Mouth (Porth Neigwl), 45 km away
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