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

information circle48hr Weather and Surf, issued 12 am 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
12.8° C
(Which is 1.3°C warmer than normal for this time of year)

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

  • Morning surf: Morning surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.
  • Afternoon surf: Afternoon surf (30 May, local time) - 2.5ft (0.7m), 4s period with SSW swell.
  • Evening surf: Evening surf (30 May, local time) - 2.5ft (0.8m), 4s period with SSW swell.

The current surf forecast for Cable Bay (Porth Trecastell) at 6AM is: 0.8m 4s primary swell from a South-southwest direction and 0.1m 16s secondary swell from a Southwest direction, 0.1m 11s secondary swell from a Southwest direction (forecast issued at 12:00am May 30). The wind direction is predicted to be cross-onshore.

Time (BST) & DateWave HeightWave Period
Morning (30 May)2.5ft (0.8m)4s
Afternoon (30 May)2.5ft (0.7m)4s
Evening (30 May)2.5ft (0.8m)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

Light rain (total 7mm), mostly falling on Sat night. Very mild (max 14°C on Sat morning, min 12°C on Fri night). Mainly fresh winds.

Saturday
30
Sunday
31
Monday
1
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 MapHeight MapHeight Map
Height MapHeight MapHeight Map
Height MapHeight MapHeight Map
Wave
Height (m)
Direction
Period (s)
0.9
SW
5
0.8
SSW
5
0.8
SSW
4
0.8
SSW
4
0.8
SSW
4
0.7
SSW
4
0.7
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
0.3
SW
12
0.7
SW
5
1
SSW
5
1.2
SSW
5
1.1
SSW
5
1.1
SSW
5
1.2
SSW
5
1.2
SSW
5
Wave Graph
Metric surfscale
Energy kJ
38
29
20
19
19
14
13
28
43
35
26
23
23
23
23
23
23
25
42
64
55
56
78
81
Wind (km/h)
20
S
20
S
20
S
20
S
25
SSW
20
SSW
20
SSW
25
S
20
SSW
15
SW
15
SW
15
W
15
SW
20
SSW
20
S
20
S
20
S
20
S
25
S
30
S
20
S
20
S
15
SE
10
SE
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
cross-on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross
cross
High Tide
9:25AM3.63m
9:43PM3.74m
10:03AM3.65m
10:18PM3.78m
10:40AM3.62m
Low Tide
3:58AM0.59m
4:14PM0.59m
4:35AM0.52m
4:50PM0.60m
5:12AM0.49m
5:25PM0.63m
part cloud
part cloud
part cloud
part cloud
cloud
clear
cloud
rain showers
cloud
cloud
part cloud
part cloud
clear
cloud
part cloud
part cloud
part cloud
part cloud
light rain
light rain
cloud
light rain
light rain
mod rain
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
4:58
4:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:31
9:32
9:34
2
1
1
1
2
7
Temp °C
13
12
12
13
14
14
14
12
12
13
13
13
13
14
14
13
13
12
12
13
13
13
14
14
9
8
8
9
10
10
11
8
8
10
11
10
10
10
10
10
10
8
8
8
10
10
13
13
Swell 1
Height (m)
Direction
Period (s)
0.1
SW
15
0.1
SW
16
0.1
SW
16
0.1
SW
16
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.3
SW
14
0.2
WSW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
SW
12
0.3
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
Energy kJ
9
9
10
10
8
8
7
7
32
15
24
23
23
23
23
23
23
5
5
5
5
8
8
8
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
11
0.1
SW
11
0.1
SW
11
0.1
SW
11
0.1
SW
11
0.1
SW
11
0.1
SW
8
0.1
SW
9
0.1
W
9
0.1
SW
15
0.1
SW
15
0.1
SW
15
0.2
WNW
3
0.2
WNW
3
0.1
SW
8
0.1
SW
8
0.1
SW
8
0.1
SW
14
0.1
SW
14
0.1
SW
14
0.1
SW
11
0.1
SW
14
0.1
SW
10
Energy kJ
5
5
5
5
4
4
2
3
1
9
9
9
1
1
3
2
2
8
8
8
5
8
4
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
9
0.1
W
9
0.1
W
9
0.1
S
11
0.1
SW
8
0.1
W
9
0.1
SW
15
0.1
SW
15
0.1
SW
14
Energy kJ
3
2
2
2
3
2
9
9
8
Wind waves
Height (m)
Direction
Period (s)
0.9
SW
5
0.8
SSW
5
0.8
SSW
4
0.8
SSW
4
0.8
SSW
4
0.7
SSW
4
0.7
SSW
4
0.9
SSW
4
1
SW
5
0.9
SW
5
0.8
SW
5
0.6
SW
5
0.5
SW
5
0.6
SSW
5
0.6
SW
4
0.6
SW
4
0.6
SW
5
0.7
SW
5
1
SSW
5
1.2
SSW
5
1.1
SSW
5
1.1
SSW
5
1.2
SSW
5
1.2
SSW
5
Energy kJ
38
29
20
19
19
14
13
28
43
35
26
17
12
18
10
15
18
25
42
64
55
56
78
81
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
2
1
1
Distance (km)
172
150
118
179
299
44
248
167
105
105
44
44
319
338
294
105
105
73
226
196
226
179
258
226
Best forecast wave conditions in Anglesy
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
2
2
2
2
1
2
2
2
3
2
3
2
2
2
2
2
3
2
2
2
2
2
2
2
Header Global
Rating
(10 max)
5
5
5
5
5
6
8
7
7
7
7
6
6
5
5
5
5
5
5
5
4
5
8
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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