Mariehamn weather live forecast

Today's maximum temperature in Mariehamn is expected to be 18°C. Select a day from the live weather forecast for Mariehamn, Finland for more weather parameters.

Thursday
18th Jun
18

12

5

4
Friday
19th Jun
20

12

11

5
Saturday
20th Jun
21

14

10

5
Sunday
21st Jun
19

14

12

5
Monday
22nd Jun
17

13

7

5

5-day weather forecast updated at 04:00 on Thursday 18th June 2026 GMT

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The 5-day weather forecast for Finland (Mariehamn) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Mariehamn weather forecast by day

Below are the detailed weather forecasts for Mariehamn for the next 5 days.

Mariehamn weather for Thursday 18th June 2026

Expect mostly cloudy with light rain in Mariehamn, Finland with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 9% chance of some rain and a light breeze of 12 kph from the west.

18
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
4
UV index (Moderate)
9
% chance of some rain
<2
mm of rainfall expected
18
°C wind chill
12
kph wind from W

Mariehamn weather for Friday 19th June 2026

Expect scattered clouds in Mariehamn, Finland with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

20
°C maximum temperature
12
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
16
kph wind from S

Mariehamn weather for Saturday 20th June 2026

Expect broken clouds in Mariehamn, Finland with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the south.

21
°C maximum temperature
14
°C minimum temperature
broken clouds
10
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
21
°C wind chill
27
kph wind from S

Mariehamn weather for Sunday 21st June 2026

Expect isolated thunderstorms in Mariehamn, Finland with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 12% chance of some rain and a moderate breeze of 21 kph from the north-west.

19
°C maximum temperature
14
°C minimum temperature
isolated thunderstorms
12
hours of sunshine
5
UV index (Moderate)
12
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
21
kph wind from NW

Mariehamn weather for Monday 22nd June 2026

Expect broken clouds in Mariehamn, Finland with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-east.