Cable Bay (Porth Trecastell) surfForecast / Wales – Anglesy / UK

information circle48hr Weather and Surf, issued 6 pm Saturday 30 May 2026 BST
Forecast update in hr  min  s Forecast update imminent
Cable Bay (Porth Trecastell) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Cable Bay (Porth Trecastell) sea temperature is
12.9° C
(Which is 1.4°C warmer than normal for this time of year)

How big are the waves at Cable Bay (Porth Trecastell) today (30 May):

  • Afternoon surf: Afternoon surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.
  • Evening surf: Evening surf (30 May, local time) - 3ft (0.9m), 4s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 9PM is: 0.9m 4s primary swell from a South-southwest direction and 0.1m 14s secondary swell from a Southwest direction, 0.1m 9s secondary swell from a Southwest direction (forecast issued at 06:00pm May 30). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (30 May)--
Afternoon (30 May)2.5ft (0.8m)4s
Evening (30 May)3ft (0.9m)4s

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


Updates in  hr  min  s Forecast update imminent

Short Range Forecast

Heavy rain (total 28mm), heaviest during Mon night. Very mild (max 15°C on Sat afternoon, min 12°C on Sat night). Mainly fresh winds.

Sat
30
Sunday
31
Monday
1
Tue
2
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
1 AM
4 AM
7 AM
10 AM
1 PM
Rating
(10 max)
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
4
0.8
SSW
4
0.9
SSW
4
1
SW
5
0.9
SW
5
0.8
SW
5
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.9
SSW
5
1.2
SSW
5
1.3
SSW
5
1.3
SSW
5
1.3
SSW
5
1.3
SSW
5
1.4
SSW
6
1.3
SSW
6
1
SSW
6
0.9
SSW
6
0.7
SW
6
0.7
SW
6
0.7
SW
6
Wave Graph
Metric surfscale
Energy kJ
17
18
34
45
33
26
23
23
23
23
23
39
69
86
82
86
90
119
97
65
59
37
38
40
Wind (km/h)
20
SSW
25
S
25
S
20
SSW
15
SSW
10
W
15
W
15
SW
20
SW
20
S
25
S
25
S
25
S
30
S
30
S
25
SSE
30
S
25
S
25
S
20
SSW
15
SSW
10
SW
15
W
15
W
cross-on
cross-on
cross-on
cross-on
on
cross-on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
cross-on
High Tide
9:43PM3.74m
10:03AM3.65m
10:18PM3.78m
10:40AM3.62m
10:54PM3.79m
11:17AM3.55m
Low Tide
4:14PM0.59m
4:35AM0.52m
4:50PM0.60m
5:12AM0.49m
5:25PM0.63m
5:48AM0.50m
clear
clear
part cloud
light rain
cloud
part cloud
cloud
part cloud
part cloud
part cloud
cloud
part cloud
cloud
cloud
light rain
light rain
heavy rain
light rain
heavy rain
cloud
cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:56
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:31
9:32
9:34
9:35
1
1
1
11
1
13
Temp °C
15
14
13
12
13
13
13
13
14
14
13
13
12
12
13
13
14
14
13
13
12
13
13
13
10
9
8
8
10
11
10
9
10
10
9
9
7
7
8
9
10
11
9
10
9
12
11
10
Swell 1
Height (m)
Direction
Period (s)
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.3
SW
14
0.9
SW
5
0.8
SW
5
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.1
SW
12
0.1
SW
11
0.1
SW
11
0.1
SW
11
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
13
0.7
SW
6
0.7
SW
6
0.7
SW
6
Energy kJ
8
7
7
32
33
26
23
23
23
23
23
23
5
5
5
5
8
8
8
8
7
37
38
40
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
11
0.1
SW
9
0.1
W
9
0.1
W
9
0.2
WSW
12
0.3
SW
12
0.1
SW
15
0.2
WNW
3
0.1
SW
8
0.1
SW
8
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
10
0.1
W
10
0.1
SW
13
0.1
SW
13
0.1
SW
13
Energy kJ
4
3
2
1
15
24
9
1
3
2
8
8
8
8
8
8
4
2
7
7
7
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
8
0.1
W
9
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.1
SW
15
Energy kJ
3
2
9
9
9
9
Wind waves
Height (m)
Direction
Period (s)
0.8
SSW
4
0.8
SSW
4
0.9
SSW
4
1
SW
5
0.7
SW
5
0.6
SW
5
0.7
SW
4
0.6
SSW
4
0.6
SSW
4
0.9
SSW
5
1.2
SSW
5
1.3
SSW
5
1.3
SSW
5
1.3
SSW
5
1.3
SSW
5
1.4
SSW
6
1.3
SSW
6
1
SSW
6
0.9
SSW
6
0.2
WNW
3
Energy kJ
17
18
34
45
23
23
12
9
9
39
69
86
82
86
90
119
97
65
59
1
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
2
2
1
1
2
2
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
150
299
44
248
167
105
167
167
44
44
302
258
105
105
73
226
226
226
226
248
248
167
44
44
Best forecast wave conditions in Anglesy
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
1
1
2
2
3
3
3
2
1
2
3
2
3
2
2
2
2
2
2
3
2
2
1
Header Global
Rating
(10 max)
5
5
6
8
7
7
7
7
7
6
5
5
5
5
5
5
5
4
5
5
5
5
5
4
  • 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

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