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Surf Forecasts:

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

information circle12 Day Weather and Surf, issued 5 am Wednesday 14 Jan 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
8.2° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Cable Bay (Porth Trecastell) this week:

The surf forecast for Cable Bay (Porth Trecastell) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jan 15) at 3PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.3m and 4s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Cable Bay (Porth Trecastell) in the next 12 days are 2.5m 7s and forecast to arrive on Wednesday (Jan 14) at 9PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Wednesday (Jan 14) at 9AM.

Wave TypeTime (GMT) & Date Wave Height & Period
Next good surf (1 star+) 3PM (Thu 15th Jan)3ft (0.9m) 8s
Best Surf 6AM (Sat 17th Jan)4ft (1.2m) 8s
Most Powerful 9PM (Wed 14th Jan)8ft (2.5m) 7s

Table - best surf conditions forecast for Cable Bay (Porth Trecastell) over the next 12 days.

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Moderate rain (total 14mm), heaviest on Wed night. Mild temperatures (max 9°C on Wed night, min 6°C on Wed afternoon). Winds decreasing (strong winds from the S on Wed night, calm by Thu afternoon).

Days 3-6 Weather Summary Moderate rain (total 13mm), heaviest on Sun afternoon. Mild temperatures (max 8°C on Sat afternoon, min 6°C on Sat morning). Wind will be generally light.

Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.1
SW
1.9
SSW
2.2
SSW
1.3
SW
0.9
SSW
0.9
SSW
1.5
S
1.8
S
1.6
SSW
1
SSW
0.8
SSW
0.6
SSW
0.4
SSW
0.4
SSW
0.3
SSW
0.3
SSW
0.3
SSW
0.1
W
0.3
SSW
0.1
SW
0.1
SW
Period(s) (?)1068888668888776651641614
Wave
Graph
(?)Metric surfscale
Energy kJ (?)2402255462161121031442472981438440211886454108
Wind
(km/h)
25
SSW
35
S
25
SSW
20
SW
5
WSW
20
S
30
S
35
S
30
SSE
10
SE
10
E
15
E
15
ESE
20
ENE
10
E
15
SSE
25
S
10
ESE
10
E
20
ENE
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on		ononglasscross-
on		cross-
on		cross-
on		crosscrosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
on		cross-
off		cross-
off		cross-
off		cross-
off
High Tide
/ height (m)
6:38PM
3.03
7:07AM
3.17
7:32PM
3.16
7:54AM
3.36
8:17PM
3.31
8:34AM
3.57
8:55PM
3.44
9:10AM
3.76
9:29PM
3.55
9:43AM
3.93
10:01PM
3.63
10:13AM
4.06
10:31PM
3.67
Low Tide
/ height (m)
1:02PM
1.32
1:26AM
1.21
1:54PM
1.10
2:11AM
1.03
2:37PM
0.87
2:50AM
0.82
3:15PM
0.65
3:26AM
0.63
3:52PM
0.45
4:01AM
0.47
4:27PM
0.30
4:35AM
0.37
5:03PM
0.20
Wednesday
14
Thursday
15
Friday
16
Saturday
17
Sunday
18
Monday
19
Tuesday
20
Sunrise8:26--8:25--8:23--8:22--8:22--8:21--8:18--
Sunset-4:28--4:29--4:30--4:32--4:34--4:36--4:37-
cloud
light rain
rain showers
part cloud
part cloud
rain showers
rain showers
light rain
cloud
cloud
part cloud
cloud
cloud
heavy rain
rain showers
part cloud
part cloud
cloud
cloud
light rain
part cloud
Rain (mm)
-16--412-----121----1-
Temp. °C779877887787767887766
Feels °C (?)0-23450-10-2343214323411
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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FREE! Surf-Forecast.com widget for your website

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

Information about the Cable Bay (Porth Trecastell) Surf forecast

The above surf forecast table for Cable Bay (Porth Trecastell) provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Cable Bay (Porth Trecastell) can be found by selecting the local surf guide option on the grey menu. Our Cable Bay (Porth Trecastell) surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Cable Bay (Porth Trecastell)) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Cable Bay (Porth Trecastell) may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Are you planning a holiday in Anglesy? If you are looking for accommodation near Cable Bay, camping, hotels and holiday cottages in Anglesy, consider staying in Anglesey which is 4 km (2 miles) away. Other places in and around Anglesy where you can find information about places to rent, and car hire include Holyhead which is 14 km (9 miles) away, Bangor, Porthmadog and Llandudno.

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