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Surf Forecasts:

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

information circle48hr Weather and Surf, issued 5 am Wednesday 18 Mar 2026 GMT
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
8.4° 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 10AM is: 0.8m 7s primary swell from a South-southwest direction and 0.3m 17s secondary swell from a Southwest direction (forecast issued at 05:00am March 18). The wind direction is predicted to be offshore.

Time (GMT) & DateWave HeightWave Period
Morning (18 Mar)3ft (0.9m)8s
Afternoon (18 Mar)1ft (0.3m)16s
Evening (18 Mar)1.5ft (0.4m)7s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wednesday
18
Thursday
19
Friday
20
Sat
21
3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM
Rating
(10 max)
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
SSW
1
SSW
0.9
SSW
0.3
SW
0.3
SW
0.6
SSW
0.4
SSW
0.4
SW
0.3
SSW
0.3
SW
0.2
SSW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.1
SW
0.1
S
0.1
S
0.1
S
0.1
S
0.1
S
0.1
S
0.1
S
Period(s) (?)88817167776766766666151515151515
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2041208856403218128732211111444444
Wind
(km/h)
20
SSE
15
SE
5
ENE
10
NE
10
NE
15
NNE
15
NE
5
NE
5
W
5
ESE
0
SSE
10
SW
10
SW
5
WNW
0
ESE
5
SSE
5
SSE
5
SSE
5
SSE
0
W
5
NW
5
NE
5
NE
5
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrossoffoffoffcross-
off		offoffglassglassglassononglassglassglassglassglassglassglassglassglassoffoff
High Tide
/ height (m)
8:46AM
4.16
9:09PM
3.94
9:17AM
4.38
9:39PM
4.11
9:50AM
4.50
10:12PM
4.21
Low Tide
/ height (m)
3:33PM
-0.02
3:43AM
0.13
4:08PM
-0.20
4:20AM
-0.00
4:45PM
-0.25
Wednesday
18
Thursday
19
Friday
20
Sat
21
Sunrise--6:26-------6:24-------6:20-----
Sunset-----6:25-------6:28-------6:30--
part cloud
clear
cloud
part cloud
cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
Rain (mm)
------------------------
Temp. °C101111131414131413131212131313121111101112111110
Feels °C (?)6791011111013121211101111119998910987
  • 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Cable Bay (Porth Trecastell) surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Cable Bay (Porth Trecastell) at:
surf-forecast.com

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