Cable Bay (Porth Trecastell) Surf Break

Cable Bay (Porth Trecastell) Surf Forecast and Surf Report

Lat Long: 53.22° N 4.51° W

Issued: 6 pm 06 Jul 2026 (local time)

Forecast update in  hr  min

Today's Cable Bay (Porth Trecastell) sea temperature is
15.7° C

1.4°C warmer than normal for this time of year

Cable Bay (Porth Trecastell) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Cable Bay (Porth Trecastell) surf forecast from 6 Jul 2026:

  • Most powerful swell: Monday 6 Jul, 10PM (local time) - 2.5ft (0.7m), 5s period, SW swell with 23 kJ wave energy.

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

The most powerful waves expected at Cable Bay (Porth Trecastell) in the next 16 days are 0.7m 5s and forecast to arrive on Monday (Jul 06) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Jul 11) at 4AM.

Wave TypeTime (BST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful10PM (Mon 6th Jul)2.5ft (0.7m) 5s

Table - best surf conditions forecast for Cable Bay (Porth Trecastell) over the next 16 days.


Updates in  hr  min  s Forecast update imminent

Alright mate, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.

Honestly, it’s a pretty grim stretch for Cable Bay (Porth Trecastell). The whole first week is a write-off, with nothing but tiny, weak, and messy conditions. You’re looking at a solid 10 days of flat or near-flat surf with poor conditions. The water is a touch warmer than normal at 60.3°, but that’s about the only positive.

Things start to stir a little around Thursday the 16th of July, but it’s still not worth getting excited about. The first real sign of life is on Friday the 17th of July morning. We get a modest SSW swell pushing 3ft, with a clean offshore wind from the NE. The energy is still weak (80), and the period is a short 6 seconds, so it’ll be a bit crumbly, but it’s the first surfable wave in over a week. The wind will be clean, but the quality is just ordinary.

The best chance of the whole period looks to be Monday the 20th of July. The swell picks up to 4.6ft from the SW, with a period of 7 seconds. The combined energy climbs into moderate territory (171), and the morning sees a light breeze from the N, keeping things clean. The wind state is cross-offshore, so it should be reasonably tidy. It’s not a world-beater, but it’s the standout window. The crowd at Cable Bay can be a problem sometimes, so expect some company.

By Tuesday the 21st of July, the swell holds at 4.9ft from the SW, but the wind swings onshore, making it a bit bumpy and less appealing. The energy is still moderate (154), but the quality will drop.

Overall, don’t hold your breath for the first ten days. The best bet is to target the morning of Monday the 20th of July for the cleanest, most consistent waves on offer.

Short Range Forecast

Mostly dry. Warm (max 20°C on Wed afternoon, min 14°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 22°C on Fri morning, min 14°C on Fri night). Mainly fresh winds.

Mon
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
Sunday
12
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
Rating
(10 max)
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 Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
5
0.7
SSW
5
0.6
NW
4
0.4
NW
4
0.4
SW
4
0.2
SSW
3
0.1
S
11
0.2
WNW
3
0.5
N
3
1.2
NNW
6
1
NNW
6
1
N
5
0.7
N
5
0.6
NE
5
0.8
NE
4
0.6
NE
4
0.4
NE
3
Wave Graph
Metric surfscale
Energy kJ
14
21
16
4
3
1
0
0
3
1
0
0
0
0
0
0
0
0
0
0
0
Wind (km/h)
20
SSW
10
SSW
15
WSW
15
SSW
10
S
5
W
10
WSW
10
S
10
WNW
10
NW
10
NE
15
NE
20
NNE
15
N
20
NNE
20
NNE
25
NE
20
ENE
25
NE
20
ENE
20
NE
Wind State
on
cross-on
on
on
cross-on
cross-on
on
cross-on
cross
cross
off
off
cross-off
cross-off
cross-off
off
off
off
off
off
off
High Tide
2:23AM3.59m
2:59PM3.16m
3:15AM3.47m
4:00PM3.13m
4:19AM3.39m
5:08PM3.17m
5:31AM3.38m
6:16PM3.29m
6:42AM3.46m
7:20PM3.49m
7:48AM3.62m
8:18PM3.75m
8:48AM3.79m
Low Tide
8:52PM1.00m
9:30AM0.79m
9:42PM1.13m
10:22AM0.89m
10:42PM1.21m
11:26AM0.95m
11:55PM1.20m
12:38PM0.92m
1:12AM1.03m
1:49PM0.78m
2:21AM0.73m
2:51PM0.57m
3:21AM0.38m
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
4:58
5:00
5:01
5:01
5:03
5:05
5:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
9:45
9:45
9:44
9:43
9:43
9:42
9:40
9:39
 mm
Temp °C
17
16
16
19
18
19
20
20
19
21
21
22
22
17
20
21
20
19
20
19
17
Feels °C
14
14
14
17
16
19
19
20
18
20
21
20
20
14
18
19
17
15
16
15
12
Swell 1
Height (m)
Direction
Period (s)
0.2
WNW
3
0.7
SSW
5
0.6
NW
4
0.4
NW
4
0.1
S
12
0.2
SSW
3
0.1
S
11
0.2
WNW
3
1
NNW
6
0.4
NW
5
0.7
N
5
Energy kJ
1
21
16
4
3
1
3
1
72
7
25
Swell 2
Height (m)
Direction
Period (s)
0.4
SW
4
Energy kJ
5
Swell 3
Height (m)
Direction
Period (s)
0.1
S
12
Energy kJ
3
Wind waves
Height (m)
Direction
Period (s)
0.6
SSW
5
0.4
NW
4
0.4
SSW
3
0.4
SW
4
0.2
WNW
3
0.2
WNW
3
0.2
NNW
3
0.5
N
3
1.2
NNW
6
1
N
5
0.6
NE
5
0.6
NE
5
0.8
NE
4
0.6
NE
4
0.4
NE
3
Energy kJ
14
3
3
3
1
1
1
4
97
45
17
14
20
12
3
Nearest Offshore or Glassy
Rating
(10 max)
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Distance (km)
260
261
244
412
256
246
283
246
178
243
233
176
180
233
260
325
260
380
373
283
211
Best forecast wave conditions in Anglesy
Rating
(10 max)
Best forecast wave conditions in United Kingdom
Rating
(10 max)
1
2
2
2
2
1
2
2
2
2
1
1
1
2
1
1
1
1
1
1
Header Global
Rating
(10 max)
7
5
5
9
8
9
7
7
6
6
6
5
5
4
5
5
4
9
7
5
7
  • 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
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Cable Bay (Porth Trecastell):

join our community of surf reporters

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.


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 16 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.

Nearest locationNearest