Portstewart Sea Conditions and Tide Table

Portstewart 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 08:48 AM and sunset is at 03:57 PM.

Days 1–3 Weather Summary

Moderate rain (total 12mm), heaviest on Sat night. Low air temperatures (max 9°C on Fri morning, min 6°C on Fri night). Winds decreasing (strong winds from the SE on Sat afternoon, calm by Sat night).

Days 4–6 Weather Summary

Light rain (total 3mm), mostly falling on Mon morning. Low air temperatures (max 8°C on Mon morning, min 4°C on Wed night). Wind will be generally light.

Days 7–9 Weather Summary

Mostly dry. Mild temperatures (max 7°C on Sat night, min 4°C on Thu morning). Wind will be generally light.

Days 10–12 Weather Summary

Mostly dry. Mild temperatures (max 8°C on Mon afternoon, min 3°C on Sun morning). Wind will be generally light.

Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sunday
28
Monday
29
Tuesday
30
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
5:39PM1.50m
6:02AM1.66m
6:11PM1.52m
6:36AM1.70m
6:42PM1.51m
7:12AM1.71m
7:14PM1.50m
7:48AM1.71m
7:48PM1.46m
8:25AM1.69m
8:25PM1.41m
9:05AM1.66m
9:06PM1.34m
9:49AM1.61m
9:56PM1.26m
10:40AM1.56m
11:00PM1.19m
11:44AM1.51m
00:24AM1.17m
1:02PM1.49m
1:51AM1.24m
2:19PM1.51m
3:02AM1.37m
Low Tide
11:58AM0.35m
00:01AM0.27m
12:34PM0.33m
00:34AM0.23m
1:10PM0.35m
1:06AM0.21m
1:45PM0.38m
1:37AM0.21m
2:21PM0.42m
2:07AM0.23m
2:58PM0.47m
2:40AM0.27m
3:40PM0.50m
3:17AM0.33m
4:29PM0.52m
4:03AM0.40m
5:28PM0.53m
5:02AM0.48m
6:35PM0.52m
6:18AM0.53m
7:47PM0.48m
7:45AM0.52m
8:57PM0.42m
Wave
height (m) 
direction
period (s) 
2.3
NW
16
2.4
NW
16
1.8
NW
14
1.2
NW
12
1.3
NW
12
1.2
NW
16
2.1
NW
17
2
NW
16
1.7
NW
15
1
NW
13
0.9
NW
12
0.7
NW
11
0.6
NW
16
1.1
NW
15
1.1
NW
15
1.1
NW
14
1
NW
13
0.8
NW
12
0.6
NW
11
0.6
NW
11
0.5
NW
12
0.6
NW
13
0.6
NW
14
0.6
NW
13
0.8
NW
12
0.9
NNW
12
0.7
NW
11
0.6
NW
10
0.5
NW
15
0.4
NW
14
0.4
NW
13
0.6
NW
13
0.9
NW
7
0.8
NNW
6
0.6
NW
6
0.6
NNW
6
part cloud
part cloud
part cloud
clear
part cloud
mod rain
cloud
cloud
light rain
rain showers
light rain
part cloud
part cloud
clear
part cloud
cloud
clear
part cloud
part cloud
part cloud
cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
cloud
part cloud
clear
part cloud
clear
clear
clear
clear
some clouds
some clouds
some clouds
clear
some clouds
mod rain
cloudy
cloudy
light rain
rain shwrs
light rain
some clouds
some clouds
clear
some clouds
cloudy
clear
some clouds
some clouds
some clouds
cloudy
clear
some clouds
some clouds
clear
some clouds
some clouds
some clouds
cloudy
some clouds
clear
some clouds
clear
clear
clear
clear
 km/h
40
WSW
30
SW
25
SSE
35
SSE
45
SE
30
SE
20
SE
25
E
25
E
15
SSE
20
S
20
SE
15
ESE
15
E
10
E
15
ESE
15
ESE
15
SE
15
SE
10
SSE
5
S
5
E
5
ENE
5
ESE
0
ESE
5
NE
10
ESE
5
SE
10
E
10
NNW
10
N
20
N
20
N
15
NNE
5
N
10
S
 mm 
8
4
1
2
max°C
9
9
8
9
9
8
8
9
9
8
6
7
7
7
8
8
7
6
4
5
5
6
6
5
5
6
7
3
4
4
5
8
8
7
7
6
Moonrise
9:12
10:05
10:41
11:05
11:20
11:31
11:39
11:46
11:52
12:00
12:09
12:22
Moonset
2:36
3:31
4:43
6:03
7:28
8:52
10:16
11:40
1:06
2:36
4:12
Sunrise
8:48
8:49
8:51
8:51
8:51
8:52
8:52
8:52
8:52
8:52
8:52
8:52
Sunset
3:57
3:57
3:57
3:59
3:59
4:00
4:00
4:01
4:01
4:02
4:04
4:05
Today's sea temperature in Portstewart is
10.8° C
(Statistics for 19 Dec 1981-2005 – mean: 9.9 max: 10.8 min: 8.9°C)
Issued (local time): 5 am Friday 19 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest