Mariehamn weather live forecast

Today's maximum temperature in Mariehamn is expected to be 12°C. Select a day from the live weather forecast for Mariehamn, Finland for more weather parameters.

Sunday
17th May
12

7

14

4
Monday
18th May
14

6

9

3
Tuesday
19th May
11

7

1

2
Wednesday
20th May
15

6

10

4
Thursday
21st May
13

7

17

4

5-day weather forecast updated at 04:00 on Sunday 17th May 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 Sunday 17th May 2026

Expect scattered clouds in Mariehamn, Finland with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south.

12
°C maximum temperature
7
°C minimum temperature
scattered clouds
14
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
12
°C wind chill
21
kph wind from S

Mariehamn weather for Monday 18th May 2026

Expect scattered clouds in Mariehamn, Finland with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.

14
°C maximum temperature
6
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
13
kph wind from N

Mariehamn weather for Tuesday 19th May 2026

Expect isolated thunderstorms in Mariehamn, Finland with a maximum temperature of 11°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 68% chance of some rain and a gentle breeze of 19 kph from the north.

11
°C maximum temperature
7
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
2
UV index (Low)
68
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
19
kph wind from N

Mariehamn weather for Wednesday 20th May 2026

Expect sunshine and showers in Mariehamn, Finland with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 10% chance of some rain and a gentle breeze of 18 kph from the south-west.

15
°C maximum temperature
6
°C minimum temperature
sunshine and showers
10
hours of sunshine
4
UV index (Moderate)
10
% chance of some rain
<2
mm of rainfall expected
15
°C wind chill
18
kph wind from SW

Mariehamn weather for Thursday 21st May 2026

Expect scattered clouds in Mariehamn, Finland with a maximum temperature of 13°C, maximum UV of 4 (Moderate) and 17 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.