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Southwest Finland

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Southwest Finland Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Southwest Finland year round climate

  • Spring (March–May): Average -32–51°F, climate shifts from cold to mild, with less rainfall. Common activities: Outdoor walks, enjoying early spring scenery. Recommended clothing: Warm jacket, sweater, waterproof jacket.
  • Summer (June–August): Average 61–63°F, warm and humid climate, moderate rainfall, with the most rainfall in August. Common activities: Beach activities, hiking, camping. Recommended clothing: Light and breathable clothing, rain gear.
  • Autumn (September–November): Average 54–35°F, climate shifts from cool to cold, moderate rainfall. Common activities: Autumn leaf viewing, picking activities. Recommended clothing: Warm jacket, sweater, waterproof jacket.
  • Winter (December–February): Average -3.8–-36.0°F, cold climate, less rainfall, mainly snowfall. Common activities: Skiing, ice skating, indoor activities. Recommended clothing: Heavy warm jacket, hat, gloves, scarf.

Southwest Finland climatological average

Annual average temperature: approx. 43.9°F / Annual rainfall: approx. 649 mm / Summer humidity: 65%–75% / Rainiest month: August

Southwest Finland monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
25.2°F
67.7
February
28°F
55.3
March
31.1°F
35.7
April
38.7°F
33.7
May
51.6°F
22.3
June
61.7°F
39.7
July
63.5°F
58
August
63.5°F
100.7
September
54.9°F
56.7
October
44.6°F
71
November
36°F
60.3
December
27.7°F
48.7

Southwest Finland weather for the next seven days

7/12
Sunday
Patchy rain nearby
80.8°F/61°F
7/13
Monday
Sunny
74.3°F/57.2°F
7/14
Tuesday
Sunny
75.5°F/57.8°F
7/15
Wednesday
Sunny
75.3°F/57°F
7/16
Thursday
Sunny
77.3°F/58.5°F
7/17
Friday
Partly Cloudy
71.5°F/58.7°F
7/18
Saturday
Sunny
71.8°F/60.5°F

Southwest Finland Frequently Asked Questions and Useful Information for Travel

What is the best time of year to visit Southwest Finland for pleasant weather and outdoor activities?

The best time to visit Southwest Finland for pleasant weather and outdoor activities is generally from June to August. During these summer months, you can enjoy the Archipelago Sea, hiking trails, and the long daylight hours. For a balance of mild weather and vibrant autumn colors, September is also a wonderful choice for exploring the region's natural beauty and coastal towns.

Can US citizens travel to Southwest Finland?

Yes, US citizens can travel to Southwest Finland for short stays of up to 90 days for tourism. As Finland is part of the Schengen Area, you will need a passport valid for at least three months beyond your planned departure date. For stays longer than 90 days, a Schengen visa or residence permit may be required.

How many days are recommended for a trip to Southwest Finland?

A 4 to 7-day trip is often sufficient to experience the highlights of Southwest Finland, including exploring charming coastal cities like Turku and Naantali, and venturing into the stunning Archipelago Sea. For a more in-depth exploration of the islands, historical sites, and a relaxed pace, consider a 7 to 10-day itinerary.

What are some beautiful islands to visit in Southwest Finland?

Southwest Finland is renowned for its beautiful islands, particularly within the Archipelago Sea. While Kaunissaari is known for its sandy beaches and traditional fishing village, the wider archipelago offers countless picturesque islands with unique coastal scenery, charming villages, and opportunities for sailing and exploring. Each island offers its own distinct charm and natural beauty.

What are the main attractions in Southwest Finland for independent travelers?

For independent travelers in Southwest Finland, exploring the historic city of Turku, with its castle and cathedral, is a must. Discover the idyllic island towns like Naantali, known for its charming old town and Moominworld. Experiencing the vast Archipelago Sea by ferry, kayaking, or cycling is also a core attraction. The region offers numerous opportunities for enjoying nature, local culture, and culinary delights.