Cardiff Sea Conditions and Tide Table

Cardiff Sea Conditions table showing wave height, swell direction and period.

High and low tide times are also provided on the table along with the moon phase and forecast weather. Sunrise today is at 08:17 AM and sunset is at 04:07 PM.

Days 1–3 Weather Summary

Mostly dry. Icy conditions (max 5°C on Sat afternoon, min 0°C on Fri morning). Winds decreasing (strong winds from the ENE on Sat afternoon, light winds from the NE by Sun night).

Days 4–6 Weather Summary

Mostly dry. Low air temperatures (max 7°C on Wed night, min 1°C on Mon morning). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Mild temperatures (max 9°C on Fri night, min 6°C on Thu morning). Winds increasing (light winds from the NW on Thu morning, fresh winds from the NW by Sat afternoon).

Days 10–12 Weather Summary

Light rain (total 3mm), mostly falling on Sun afternoon. Very mild (max 11°C on Mon afternoon, min 6°C on Sun morning). Winds decreasing (fresh winds from the W on Mon morning, light winds from the NW by Tue night).

Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
Wednesday
31
Thursday
1
Friday
2
Saturday
3
Sunday
4
Monday
5
Tuesday
6
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
AM
PM
night
Wave Height Map
High Tide
11:05AM10.36m
11:31PM9.82m
11:56AM9.99m
00:27AM9.51m
12:56PM9.69m
1:33AM9.37m
2:04PM9.59m
2:43AM9.49m
3:13PM9.75m
3:48AM9.88m
4:16PM10.13m
4:46AM10.37m
5:12PM10.56m
5:39AM11.00m
6:04PM11.09m
6:28AM11.58m
6:52PM11.54m
7:15AM12.03m
7:38PM11.83m
7:59AM12.27m
8:22PM11.92m
8:43AM12.28m
9:06PM11.78m
Low Tide
5:28PM2.82m
5:46AM3.07m
6:18PM3.11m
6:40AM3.35m
7:15PM3.31m
7:41AM3.51m
8:18PM3.36m
8:49AM3.48m
9:25PM3.20m
9:58AM3.20m
10:30PM2.84m
11:03AM2.78m
11:30PM2.42m
12:01PM2.20m
00:24AM1.90m
12:53PM1.65m
1:14AM1.47m
1:41PM1.24m
1:59AM1.20m
2:26PM1.03m
2:43AM1.13m
3:09PM1.05m
3:25AM1.27m
Wave
height (m) 
direction
period (s) 
0.4
NE
3
0.6
NE
3
0.5
NE
3
0.6
NE
3
0.7
NE
4
0.6
ENE
3
0.4
NE
3
0.5
NE
3
0.4
NE
3
0.3
NE
2
0.4
NE
3
0.4
ENE
3
0.2
ENE
2
0.2
ENE
2
0
W
4
0
W
14
0
W
1
0.1
W
1
0
W
1
0.1
W
2
0.2
W
2
0.2
W
2
0.3
WSW
2
0.3
SW
3
0.3
WNW
2
0.6
NW
3
0.1
NW
2
0.1
W
2
0.4
SW
3
0.4
WSW
3
0.2
WSW
2
0.9
WSW
4
0.8
WSW
4
0.4
WSW
4
0.2
WSW
2
0.1
W
2
clear
clear
clear
clear
cloud
part cloud
part cloud
part cloud
clear
clear
clear
part cloud
clear
part cloud
clear
part cloud
clear
part cloud
clear
clear
part cloud
cloud
cloud
part cloud
clear
clear
part cloud
part cloud
light rain
part cloud
cloud
cloud
cloud
part cloud
cloud
rain showers
clear
clear
clear
clear
cloudy
some clouds
some clouds
some clouds
clear
clear
clear
some clouds
clear
some clouds
clear
some clouds
clear
some clouds
clear
clear
some clouds
cloudy
cloudy
some clouds
clear
clear
some clouds
some clouds
light rain
some clouds
cloudy
cloudy
cloudy
some clouds
cloudy
rain shwrs
 km/h
25
NE
30
NE
25
NE
30
NE
35
NE
30
ENE
25
NE
25
NE
20
NE
20
NE
25
NE
25
ENE
15
ENE
15
ENE
5
N
5
NNW
10
NW
10
NW
10
NW
15
WNW
15
NW
15
WNW
20
W
20
WNW
25
WNW
35
NW
10
WNW
10
WSW
25
SW
20
W
25
W
35
W
35
WSW
20
W
15
W
20
WNW
 mm 
1
2
max°C
1
3
1
4
5
5
2
3
3
2
3
5
3
4
3
3
6
7
6
8
7
7
8
9
8
8
7
8
10
10
10
11
11
11
9
8
Moonrise
11:29
11:40
11:53
12:08
12:27
12:56
1:38
2:40
4:01
5:31
7:00
8:25
Moonset
11:25
12:45
2:09
3:38
5:11
6:40
7:57
8:54
9:32
9:58
10:15
Sunrise
8:17
8:17
8:17
8:17
8:18
8:18
8:17
8:17
8:17
8:17
8:17
8:15
Sunset
4:07
4:08
4:09
4:10
4:12
4:13
4:14
4:15
4:15
4:17
4:19
4:20
Today's sea temperature in Cardiff is
8.8° C
(Statistics for 26 Dec 1981-2005 – mean: 10.8 max: 11.7 min: 9.9°C)
Issued (local time): 5 am Friday 26 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
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