Mariehamn Sea Conditions and Tide Table

Mariehamn 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 — and sunset is at —.

Days 1–4 Weather Summary

Some drizzle, heaviest during Wed afternoon. Low air temperatures (max 7°C on Wed afternoon, min 4°C on Wed night). Winds increasing (light winds from the WSW on Wed night, strong winds from the SSW by Fri afternoon).

Days 5–7 Weather Summary

Some drizzle, heaviest during Fri night. Low air temperatures (max 7°C on Fri night, min 3°C on Mon afternoon). Winds decreasing (strong winds from the WSW on Fri night, light winds from the NW by Mon morning).

Days 8–10 Weather Summary

Mostly dry. Freeze-thaw conditions (max 3°C on Mon night, min -4°C on Wed morning). Mainly fresh winds.

Days 11–13 Weather Summary

Some drizzle, heaviest during Sat night. Freeze-thaw conditions (max 4°C on Sat morning, min -3°C on Thu night). Winds increasing (calm on Thu night, near gales from the NNE by Sat night).

Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Tuesday
23
Wednesday
24
Thursday
25
Friday
26
Saturday
27
Sun
28
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
AM
PM
Wave Height Map
High Tide
6:15PM0.01m
6:35AM0.01m
6:48PM0.01m
7:04AM0.02m
7:19PM0.01m
7:33AM0.02m
7:47PM0.01m
8:03AM0.02m
8:15PM0.01m
8:34AM0.02m
8:42PM0.01m
9:04AM0.02m
9:12PM0.01m
9:36AM0.01m
9:45PM0.01m
10:07AM0.01m
10:27PM0.01m
10:43AM0.01m
11:21PM0.01m
11:20AM0.01m
00:37AM0.01m
12:14PM0.01m
2:11AM0.01m
1:34PM0.01m
Low Tide
11:49PM0.01m
1:16PM0.01m
00:18AM0.01m
1:48PM0.01m
00:48AM0.01m
2:17PM0.01m
1:18AM0.01m
2:49PM0.01m
1:46AM0.01m
3:20PM0.01m
2:15AM0.01m
3:53PM0.01m
2:46AM0.01m
4:28PM0.01m
3:17AM0.01m
5:04PM0.01m
5:44PM0.01m
6:30PM0.01m
5:52AM0.01m
7:24PM0.01m
7:47AM0.01m
Wave
height (m) 
direction
period (s) 
0.5
SSW
4
1
SSW
4
0.9
SSW
4
0.4
SW
3
0.6
SSW
3
1
SSW
4
0.8
SSW
4
1.2
S
5
1.3
SSW
5
1.1
SSW
5
1.3
SSW
5
0.9
SSW
5
0.7
SW
4
0.5
SW
4
0.4
SW
3
0.3
WNW
2
0.2
WNW
2
0.3
NW
2
0.4
NNE
3
0.5
NE
3
0.4
NE
3
0.5
ENE
3
0.5
E
3
0.4
E
3
0.2
ENE
2
0.2
ENE
2
0.2
ENE
2
0.1
E
3
0.4
WSW
3
0.7
WSW
4
0.6
W
3
1
W
4
1
NW
4
1.1
N
4
0.9
NNE
4
0.4
NNE
3
part cloud
cloud
light rain
clear
part cloud
part cloud
part cloud
cloud
cloud
rain showers
part cloud
clear
part cloud
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
cloud
rain showers
part cloud
clear
some clouds
cloudy
light rain
clear
some clouds
some clouds
some clouds
cloudy
cloudy
rain shwrs
some clouds
clear
some clouds
some clouds
some clouds
clear
some clouds
some clouds
clear
clear
some clouds
some clouds
some clouds
some clouds
some clouds
clear
clear
clear
clear
clear
clear
some clouds
cloudy
rain shwrs
some clouds
clear
 km/h
20
SW
35
SSW
30
WSW
15
WSW
25
SSW
40
SSW
25
SW
40
SSW
40
SSW
40
WSW
40
WSW
30
WSW
30
WSW
20
W
20
WNW
20
NW
15
NW
20
NNW
25
NE
30
NNE
25
NE
25
ENE
25
ENE
20
ENE
15
NE
15
NE
15
NE
5
SW
25
WSW
30
WSW
30
W
45
NW
40
N
50
NNE
45
NNE
15
NNE
 mm 
1
1
1
max°C
6
5
7
6
4
5
5
6
6
7
7
7
6
5
6
6
4
4
3
2
0
-1
-4
-4
-4
-4
-3
-2
-2
-1
0
4
4
2
1
1
Moonrise
7:36
9:09
10:32
11:27
11:51
12:01
12:04
12:05
12:05
12:04
12:03
12:02
Moonset
1:03
1:11
1:34
2:28
3:52
5:28
7:05
8:40
10:13
11:45
1:20
Sunrise
9:40
9:40
9:41
9:41
9:42
9:42
9:42
9:44
9:44
9:44
9:44
9:44
Sunset
3:32
3:32
3:32
3:33
3:33
3:33
3:33
3:34
3:36
3:37
3:37
3:38
Today's sea temperature in Mariehamn is
5.7° C
(Statistics for 16 Dec 1981-2005 – mean: 3.9 max: 5.6 min: 2.4°C)
Issued (local time): 7 pm Tuesday 16 Dec 2025
Forecast update inUpdates in  hr  min  sUpdate imminent
Nearest locationNearest