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 12 Sep 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
16.9°C
1.5° 

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):

  • Morning surf: Morning surf (12 Sep, local time) - 7ft (2.2m), 7s period with SW swell.
  • Afternoon surf: Afternoon surf (12 Sep, local time) - 7ft (2.1m), 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 5AM is: 1.9m 6s primary swell from a South-southwest direction (forecast issued at 12:00am September 12). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (12 Sep)7ft (2.2m)7s
Afternoon (12 Sep)7ft (2.1m)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 16mm), heaviest on Sat morning. Very mild (max 18°C on Sat night, min 14°C on Fri night). Winds decreasing (strong winds from the SSW on Fri night, calm by Sun morning).

Saturday
12
Sunday
13
Monday
14
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
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
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
SW
5
1.7
SSW
6
2.2
SW
6
2.3
SW
7
2.2
SW
7
2
SW
7
1.6
SW
7
1.4
SW
7
1.1
SW
6
0.9
SW
6
0.7
SW
6
0.6
SSW
6
0.5
SW
6
0.5
SW
6
0.4
SSW
6
0.4
SSW
6
0.6
SSW
3
0.7
SSW
4
0.9
SSW
5
1.1
SW
5
1.2
SSW
5
1.3
SSW
5
1.7
SSW
6
1.9
SSW
6
Wave Graph
Metric surfscale
Energy kJ
49
164
364
471
447
363
237
158
97
61
40
26
18
18
14
14
9
14
37
60
72
99
202
260
Wind (km/h)
25
SSW
40
SSW
45
SSW
40
SSW
35
SW
35
SW
25
SW
15
SW
10
WNW
5
NNW
10
NNE
5
NE
5
WNW
10
WSW
10
S
15
S
20
S
20
S
20
S
25
SSW
30
SSW
30
SSW
35
SSW
40
SSW
Wind State
cross-on
cross-on
on
on
on
on
on
on
cross-on
cross-off
off
glassy
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
cross-on
cross-on
High Tide
10:17PM4.51m
10:42AM4.11m
10:54PM4.52m
11:16AM4.11m
11:30PM4.39m
11:50AM4.02m
Low Tide
5:10AM-0.34m
5:22PM-0.06m
5:48AM-0.24m
5:59PM0.01m
6:23AM-0.01m
6:35PM0.19m
part cloud
cloud
cloud
light rain
mod rain
part cloud
part cloud
part cloud
part cloud
cloud
cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
cloud
part cloud
mod rain
rain showers
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:47
6:48
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:42
7:38
7:37
 mm
2
7
6
1
Temp °C
14
14
16
16
16
17
17
18
17
16
15
15
17
16
17
16
16
17
18
17
17
17
17
18
Feels °C
9
7
9
10
11
13
14
17
16
16
14
15
17
15
16
15
14
15
17
14
13
13
12
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

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