Weather in Mariehamn - 14-day forecast

Detailed weather forecast for Mariehamn, Åland: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.

Forecast for the next days in Mariehamn

today☁️ 15°💧 0.1 mm

Thu🌧️ 16°💧 0.3 mm

Fri☁️ 18°💧 1.7 mm

Sat☁️ 19°💧 0.5 mm

Sun🌧️ 16°💧 2.2 mm

Mon🌤️ 17°💧 0.2 mm

Tue☀️ 18°💧 1.4 mm

Wed☀️ 20°💧 0.2 mm

14-day forecast - Mariehamn

📅 Mariehamn 30 & 45-day weather - long-range outlook

Next 16 days · forecast

17°

around 17° at night · days with rain: 10

Weeks 3-4 · avg for July

21°

around 13° at night · rain chance 43%

Weeks 5-7 · avg for August

20°

around 12° at night · rain chance 46%

The 30 & 45-day outlook for Mariehamn: the next 16 days are a numerical forecast updated daily - on average 17° by day and 17° at night. Further out we rely on multi-year climate averages: around 21° in July, and about 20° in August. Forecasts beyond two weeks are indicative only.

Day-by-day forecast for Mariehamn

Wednesday8 July 2026

☁️15°broken clouds

sunrise 04:30 · sunset 23:00 · night 14° · evening 15° · rain 0.11 mm · humidity 67% · wind 10 m/s · clouds 84%

Thursday9 July 2026

🌧️16°light rain

sunrise 04:32 · sunset 22:58 · night 16° · evening 16° · rain 0.34 mm · humidity 76% · wind 11 m/s · clouds 47%

Friday10 July 2026

☁️18°broken clouds

sunrise 04:33 · sunset 22:57 · night 17° · evening 18° · rain 1.65 mm · humidity 72% · wind 6 m/s · clouds 51%

Saturday11 July 2026

☁️19°broken clouds

sunrise 04:35 · sunset 22:56 · night 18° · evening 18° · rain 0.53 mm · humidity 74% · wind 5 m/s · clouds 69%

Sunday12 July 2026

🌧️16°light rain

sunrise 04:37 · sunset 22:54 · night 17° · evening 17° · rain 2.22 mm · humidity 84% · wind 11 m/s · clouds 100%

Monday13 July 2026

🌤️17°scattered clouds

sunrise 04:38 · sunset 22:53 · night 17° · evening 17° · rain 0.15 mm · humidity 69% · wind 11 m/s · clouds 28%

Tuesday14 July 2026

☀️18°clear sky

sunrise 04:40 · sunset 22:51 · night 17° · evening 18° · rain 1.38 mm · humidity 74% · wind 9 m/s · clouds 3%

Wednesday15 July 2026

☀️20°clear sky

sunrise 04:42 · sunset 22:49 · night 20° · evening 20° · rain 0.18 mm · humidity 68% · wind 6 m/s · clouds 4%

Thursday16 July 2026

🌤️20°a few clouds

sunrise 04:44 · sunset 22:47 · night 20° · evening 21° · rain 5.07 mm · humidity 64% · wind 4 m/s · clouds 13%

Friday17 July 2026

🌧️19°light rain

sunrise 04:46 · sunset 22:46 · night 19° · evening 20° · rain 3.99 mm · humidity 83% · wind 8 m/s · clouds 77%

Saturday18 July 2026

🌧️18°light rain

sunrise 04:48 · sunset 22:44 · night 19° · evening 19° · rain 4.74 mm · humidity 94% · wind 11 m/s · clouds 100%

Sunday19 July 2026

🌧️16°light rain

sunrise 04:50 · sunset 22:42 · night 15° · evening 16° · rain 2.04 mm · humidity 74% · wind 13 m/s · clouds 94%

Monday20 July 2026

🌧️14°light rain

sunrise 04:52 · sunset 22:40 · night 16° · evening 16° · rain 0.93 mm · humidity 62% · wind 9 m/s · clouds 93%

Tuesday21 July 2026

🌧️16°light rain

sunrise 04:54 · sunset 22:38 · night 18° · evening 18° · rain 3.72 mm · humidity 91% · wind 9 m/s · clouds 100%

Wednesday22 July 2026

🌧️18°light rain

sunrise 04:57 · sunset 22:36 · night 17° · evening 18° · rain 2.82 mm · humidity 95% · wind 8 m/s · clouds 100%

Thursday23 July 2026

🌧️18°light rain

sunrise 04:59 · sunset 22:34 · night 16° · evening 17° · rain 4.92 mm · humidity 83% · wind 6 m/s · clouds 100%

☀️ UV index in Mariehamn - is it safe to sunbathe?

Today the UV index in Mariehamn is 6 (moderate) - unprotected fair skin can burn in about 35 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.

🌿 Pollen in Mariehamn - info for allergy sufferers

Today grasses pollen is highest in Mariehamn - about 2 grains/m³, low level. Most allergy sufferers should not feel strong symptoms. Pollen levels are a CAMS model forecast and are indicative.

🌊 Sea temperature - Mariehamn

Water today

16°C

Week avg

17°C

Waves today

0.6 m

How's the water?

cold

16-day sea temperature forecast:

8.07 16°C9.07 15°C10.07 17°C11.07 18°C12.07 17°C13.07 17°C14.07 18°C15.07 19°C16.07 18°C

Average sea temperature through the year:

Jan 1°CFeb 1°CMar 2°CApr 4°CMay 9°CJun 15°CJul 19°CAug 18°CSep 16°COct 11°CNov 7°CDec 4°C

Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.

Mariehamn weather through the year

Warmest, driest months on average: May, June, July, August.

🎉 Public holidays in Mariehamn - when are the long weekends?

Next long weekend in Mariehamn: Christmas Eve (24 December, Thursday) - Thursday–Sunday if you take Friday off (4 days).

7 NovemberSaturday

All Saints Day

falls on a weekend

6 DecemberSunday

Independence Day

falls on a weekend

24 DecemberThursday

Christmas Eve

🎈 long weekend + bridge day

25 DecemberFriday

Christmas Day

🎈 long weekend

26 DecemberSaturday

St. Stephen's Day

falls on a weekend

1 JanuaryFriday 2027

New Year's Day

🎈 long weekend

6 JanuaryWednesday 2027

Epiphany

26 MarchFriday 2027

Good Friday

🎈 long weekend

28 MarchSunday 2027

Easter Sunday

falls on a weekend

29 MarchMonday 2027

Easter Monday

🎈 long weekend

1 MaySaturday 2027

May Day

falls on a weekend

6 MayThursday 2027

Ascension Day

🎈 long weekend + bridge day

Public holidays (statutory days off) - shops, offices and some attractions may be closed. A "bridge day" is a workday between a holiday and the weekend worth taking as leave.

Nearby places

UppsalaTurkuStockholm

FAQ - Mariehamn weather

What is the weather like in Mariehamn today?

Today it is about 15° during the day and 14° at night, broken clouds.

How far ahead can I check the forecast for Mariehamn?

This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.