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Weather in Mariehamn — today

Tomorrow Day after tomorrow 3 days Week 14 days Month forecast Weather archive

Now in Mariehamn

🌙

+15°

Mostly clear

Feels like +15° · humidity 82%

Tue 28.7: +21° / +15°

🕐 00:25

Wind

6 km/h

UV index

Air (AQI)

21 · Good

Precipitation

41%

Humidity

82%

Pressure

1011 hPa

Sunrise / sunset

05:10 / 22:22

Sea temperature

🌊 +18°

👕 What to wear today

Comfortable — a T-shirt, a light sweater for the evening.

☂️ Take an umbrella

Weather for an activity:

🎣 fishing 🏖️ the beach 🏃 a run 📸 a photo shoot 🚶 a walk

Detailed weather information for Mariehamn

Tuesday, 28 July, in Mariehamn (Åland Islands): cloudy, light rain in places, moderately warm. During the day the air will warm up to +21°, at night around +15°. Wind up to 18 km/h. Brief rain is possible — an umbrella won't hurt. A T-shirt is comfortable during the day, but take a light sweater or windbreaker for the evening. Water temperature is +18° — you can swim. The sun will rise at 05:10 and set at 22:22 — daylight lasts 17 hours.

Hourly weather in Mariehamn

💧 The bars at the bottom show the hourly precipitation probability. Shaded areas of the chart are the dark hours (before sunrise 🌅 and after sunset 🌇).

Weather in Mariehamn for 14 days

Tap a day to expand it by time of day and open the full forecast. The bar shows the range from the night low (left) to the day high (right).

▶

Tue 28.7

🌦️

💧 41%

+15° +21°

Morning

🌦️

+17°

Day

🌦️

+21°

Evening

🌇

+20°

Night

🌙

+15°

Drizzle · precipitation 41% · wind up to 18 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Today 29.7

⛅

💧 20%

+14° +20°

Morning

⛅

+16°

Day

⛅

+20°

Evening

🌇

+19°

Night

🌙

+14°

Partly cloudy · precipitation 20% · wind up to 15 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tomorrow 30.7

☁️

💧 2%

+16° +22°

Morning

⛅

+18°

Day

☁️

+22°

Evening

🌇

+19°

Night

🌙

+16°

Overcast · precipitation 2% · wind up to 25 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Fri 31.7

🌦️

💧 59%

+17° +23°

Morning

🌦️

+19°

Day

🌦️

+23°

Evening

🌇

+22°

Night

🌙

+17°

Rain showers · precipitation 59% · wind up to 28 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sat 1.8

☁️

💧 8%

+15° +19°

Morning

☁️

+16°

Day

☁️

+19°

Evening

🌇

+18°

Night

🌙

+15°

Overcast · precipitation 8% · wind up to 19 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sun 2.8

☁️

💧 22%

+15° +20°

Morning

☁️

+17°

Day

☁️

+20°

Evening

🌇

+19°

Night

🌙

+15°

Overcast · precipitation 22% · wind up to 23 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 3.8

☁️

💧 11%

+15° +20°

Morning

☁️

+17°

Day

☁️

+20°

Evening

🌇

+19°

Night

🌙

+15°

Overcast · precipitation 11% · wind up to 21 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Tue 4.8

☁️

💧 24%

+16° +21°

Morning

☁️

+18°

Day

☁️

+21°

Evening

🌇

+20°

Night

🌙

+16°

Overcast · precipitation 24% · wind up to 13 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Wed 5.8

🌦️

💧 41%

+16° +22°

Morning

🌦️

+18°

Day

🌦️

+22°

Evening

🌇

+21°

Night

🌙

+16°

Drizzle · precipitation 41% · wind up to 12 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Thu 6.8

🌦️

💧 49%

+15° +19°

Morning

🌦️

+16°

Day

🌦️

+19°

Evening

🌇

+18°

Night

🌙

+15°

Drizzle · precipitation 49% · wind up to 21 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Fri 7.8

🌦️

💧 35%

+12° +19°

Morning

🌦️

+15°

Day

🌦️

+19°

Evening

🌇

+17°

Night

🌙

+12°

Drizzle · precipitation 35% · wind up to 21 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sat 8.8

🌦️

💧 33%

+12° +18°

Morning

🌦️

+14°

Day

🌦️

+18°

Evening

🌇

+17°

Night

🌙

+12°

Drizzle · precipitation 33% · wind up to 20 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Sun 9.8

⛅

💧 34%

+13° +18°

Morning

⛅

+15°

Day

⛅

+18°

Evening

🌇

+17°

Night

🌙

+13°

Partly cloudy · precipitation 34% · wind up to 17 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

▶

Mon 10.8

☁️

💧 33%

+11° +19°

Morning

☁️

+14°

Day

☁️

+19°

Evening

🌇

+17°

Night

🌙

+11°

Overcast · precipitation 33% · wind up to 11 km/h.
🙂 Mild, pleasant weather. A light sweater will come in handy in the evening.

🗺️ Precipitation radar

Precipitation radar (RainViewer) over a clean base map — updates every 5–10 minutes. Colours show nearby precipitation; if there is none, the map is simply clear — that is normal. Zoom with + / −.

Rain intensity:lightmoderateheavy

🎯 What to do in this weather — indices of the day

Comfort score from 0 (bad) to 100 (excellent), calculated from the day's weather. For “rain” and “UV” a percentage/risk level is shown.

🏖️ Beach

0 / 100

for sea and sun · Bad

🏊 Swimming

11 / 100

water 18° · Bad

🏃 Running

47 / 100

comfort for running · Average

🧴 UV

moderate · low

☂️ Rain

41%

possible · moderate

✨ Stars

59 / 100

evening visibility · Average

🧺 Laundry drying

20 / 100

will dry outside · So-so

🚗 Car wash

46 / 100

better to wait · Average

🌫️ Air quality and pollen

Good air

European AQI

PM2.5: 3PM10: 3O₃: 53NO₂: 5 pollen: low

The air is clean — you can walk and exercise outside.

🌅 Sun, moon and sea

Sunrise

05:10

Sunset

22:22

Golden hour

21:15

Daylight

17 h (-5 min vs yesterday)

Sea temperature

+18°

🌊 calm, waves 0.3 m.

🌌 Northern lights: Kp index 3 — faint aurora possible outside the city after midnight. Data: NOAA SWPC.

Mariehamn climate by month

Long-term averages. Hover over a bar for details. The forecast for a specific month is a combination of the climate normal and the model forecast for the coming weeks.

+1°

-2°

Jan

+0°

-3°

Feb

+2°

-2°

Mar

+5°

+2°

Apr

+10°

+6°

May

+15°

+11°

Jun

+19°

+15°

Jul

+18°

+15°

Aug

+14°

+12°

Sep

+9°

+7°

Oct

+5°

+3°

Nov

+3°

+0°

Dec

swipe sideways →

Bar color shows temperature:frostcoolcomfortablewarmhot— best months to visit

Month	Day	Night	Sea	Precipitation	What to pack and what makes the month notable (events, nuances)
January	+1°	-2°	+1°	37 mm	The coldest stretch: +1° by day, full winter clothing required. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+1°) — swimming is for the brave.
February	+0°	-3°	+1°	28 mm	Freezing: +0° by day, -3° at night — full winter gear, ice underfoot is common. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+1°) — swimming is for the brave. This is the coldest month of the year.
March	+2°	-2°	+1°	28 mm	Proper winter: +2° daytime, frost and short days. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+1°) — swimming is for the brave.
April	+5°	+2°	+4°	30 mm	A cold month: +5° by day, long walks get uncomfortable. 🧣 a warmer jacket. The water is cold (+4°) — swimming is for the brave.
May	+10°	+6°	+8°	36 mm	Cool: around +10° by day, you'll need a warm layer. 🧥 a warm jacket. The water is cold (+8°) — swimming is for the brave.
June	+15°	+11°	+14°	50 mm	A fresh month — +15° daytime, take a jacket for walks. 🧥 a warm jacket. The water is cold (+14°) — swimming is for the brave. The longest daylight hours of the year — more time for everything.
July	+19°	+15°	+18°	51 mm	The most pleasant season: +19° by day, comfortable all day long. 🙂 a sweater for the evening. Sea at +18° — swimmable, refreshing. This is the hottest month of the year in Mariehamn.
August	+18°	+15°	+18°	55 mm	One of the best times to visit: +18° by day, fresh nights. 🙂 a sweater for the evening. Sea at +18° — swimmable, refreshing. Weather-wise, one of the three best months to visit.
September	+14°	+12°	+16°	47 mm	A fresh month — +14° daytime, take a jacket for walks. 🧥 a warm jacket. The water is cold (+16°) — swimming is for the brave.
October	+9°	+7°	+11°	51 mm	A cold month: +9° by day, long walks get uncomfortable. 🧥 a warm jacket. The water is cold (+11°) — swimming is for the brave.
November	+5°	+3°	+7°	49 mm	Cold: +5° by day, down to +3° at night — dress warmly. 🧣 a warmer jacket. The water is cold (+7°) — swimming is for the brave.
December	+3°	+0°	+3°	47 mm	Winter weather: about +3° daytime, you need a warm coat and hat. ❄️ a warm jacket, a hat, non-slip shoes. The water is cold (+3°) — swimming is for the brave. The shortest daylight of the year — it gets dark early.

When to visit Mariehamn

✅ Recommended time to visit

🌟 Best time: June, July, August

Daytime air+15…+19°

Sea temperature+14…+18°

Precipitationoften

Featurewhite nights

Why: comfortable +15…+19° by day, little rain.

⚠️ Doable, with caveats

🌤️ Shoulder season: January, February, March, May, September, October

Daytime air+0…+14°

Sea temperature+1…+16°

Precipitationoften

Why: cool (+0…+14°) — not beach season, but great for city sights and museums.

🔴 Not the best time

❄️ Cold season: April, November, December

Daytime air+3…+5°

Sea temperature+3…+7°

Precipitationoften

Why: cold and dark (+3…+5° by day, 6 h of daylight) — only if frost and short days don’t put you off.

Bottom line: the best time to visit Mariehamn is June – August, and the most comfortable months are June, July, August. The toughest months to visit are April, November, December: cold and short days.