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

information circle48hr Weather and Surf, issued 12 am Saturday 16 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
11.3° C
(Which is slightly warmer than usual)

How big are the waves at Cable Bay (Porth Trecastell) today?

The current surf forecast for Cable Bay (Porth Trecastell) at 7AM is: 0.1m 13s primary swell from a Southwest direction and 0.2m 2s secondary swell from a West-southwest direction (forecast issued at 12:00am May 16). An open ocean swell of 0.4m 5s is not directed at the surf break. The wind direction is predicted to be glassy.

Time (BST) & DateWave HeightWave Period
Morning (16 May)0.5ft (0.1m)13s
Afternoon (16 May)0.5ft (0.1m)13s
Evening (16 May)2ft (0.6m)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

Moderate rain (total 13mm), heaviest on Sat afternoon. Very mild (max 12°C on Mon afternoon, min 8°C on Fri night). Winds increasing (calm on Fri night, fresh winds from the SW by Sun afternoon).

Saturday
16
Sunday
17
Monday
18
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
1
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)
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
SW
13
0.1
S
13
0.1
SW
13
0.5
SW
3
0.6
W
4
0.9
W
4
1.1
W
5
1
W
5
1
W
5
0.9
SW
5
1.1
SW
5
1.3
SW
5
1.3
SW
6
1.2
SW
6
1
SW
6
0.9
SW
6
0.7
SW
6
0.6
SSW
6
0.6
SSW
6
0.6
SSW
3
0.5
SSW
4
Wave Graph
Metric surfscale
Energy kJ
7
7
7
7
3
7
7
9
25
54
44
43
37
49
103
115
92
66
52
37
23
22
8
9
Wind (km/h)
5
WNW
0
NNE
0
S
10
SW
20
SW
20
SW
20
WNW
20
W
25
WNW
20
WNW
20
W
25
WSW
25
SW
30
SW
25
SW
20
SSW
20
WSW
15
WSW
5
SW
10
SW
15
SW
10
SSW
10
S
10
SE
cross-on
glassy
glassy
on
on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
cross-on
glassy
on
on
on
cross-on
cross
High Tide
9:16AM4.22m
9:42PM4.19m
10:02AM4.30m
10:24PM4.29m
10:49AM4.27m
Low Tide
3:50AM0.23m
4:14PM-0.01m
4:37AM0.01m
5:00PM-0.03m
5:24AM-0.11m
5:47PM0.04m
part cloud
cloud
cloud
cloud
light rain
light rain
rain showers
light rain
clear
clear
cloud
rain showers
part cloud
light rain
thunderstorm
light rain
light rain
rain showers
rain showers
rain showers
clear
cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:18
5:16
5:15
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:10
9:13
9:14
1
1
2
1
1
1
1
1
1
1
1
1
Temp °C
9
8
9
9
10
10
10
10
9
8
9
9
10
10
10
9
9
8
8
9
10
11
12
10
6
6
7
6
6
6
6
5
3
3
4
3
4
3
4
4
4
4
6
6
6
8
9
7
Swell 1
Height (m)
Direction
Period (s)
0.6
NNW
5
0.5
N
5
0.4
NNW
5
0.3
NNW
5
0.2
N
4
0.2
N
4
0.1
S
13
0.1
S
13
0.1
S
13
0.4
WNW
4
0.1
S
12
1
SW
6
0.9
SW
6
0.7
SW
6
0.2
WNW
4
0.3
SW
6
Energy kJ
20
13
8
4
1
1
3
3
3
7
3
66
52
37
1
5
Swell 2
Height (m)
Direction
Period (s)
0.1
SW
13
0.2
WSW
3
0.1
SW
13
0.1
S
13
0.1
SW
13
0.1
SW
13
0.1
S
12
0.4
NW
4
Energy kJ
7
1
7
3
7
7
3
4
Swell 3
Height (m)
Direction
Period (s)
0.1
SW
13
0.1
SW
13
0.1
W
13
Energy kJ
7
7
3
Wind waves
Height (m)
Direction
Period (s)
0.4
WSW
3
0.2
WSW
2
0.4
SW
2
0.4
SW
3
0.5
SW
3
0.6
W
4
0.9
W
4
1.1
W
5
1
W
5
1
W
5
0.9
SW
5
1.1
SW
5
1.3
SW
5
1.3
SW
6
1.2
SW
6
0.4
NW
4
0.4
WNW
4
0.6
SSW
6
0.6
SSW
6
0.6
SSW
3
0.5
SSW
4
Energy kJ
3
1
2
3
6
9
25
54
44
43
37
49
103
115
92
3
6
23
22
8
9
Nearest Offshore or Glassy
Rating
(10 max)
3
3
2
2
1
2
2
1
2
2
1
3
3
3
3
3
2
1
1
1
1
2
1
1
Distance (km)
272
272
272
272
256
277
272
261
261
261
187
261
261
261
256
256
256
44
0
44
150
259
248
259
Best forecast wave conditions in Anglesy
Rating
(10 max)
1
Best forecast wave conditions in United Kingdom
Rating
(10 max)
3
3
3
3
1
3
2
2
3
3
3
3
4
4
4
4
4
3
3
3
3
3
2
2
Header Global
Rating
(10 max)
5
5
5
4
5
6
6
5
4
5
4
7
9
9
4
4
4
4
5
4
4
4
4
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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