Nature and seasons
Nature in Saaristo is a blend of contrasts. The labyrinth of 40,000 islands – some little more than bare rocks, others covered in lush forests – and the Baltic Sea surrounding them, create one-of-a-kind habitats for numerous lifeforms.
Each season in Saaristo brings its colors, scents, and wildlife from sea eagles, fish, and grey seals to delicate wildflowers, mushrooms, and berries.
Seasons and weather
Finland is known for its Nordic winters, but in actuality, the region experiences four distinct seasons.
Saaristo is located on the Southwest shores of Finland, so the Baltic Sea and its currents significantly influence the area’s climate.
The area is known for its mild to cold winters and pleasantly warm, not-too-hot summers.
If you're lucky, you can spot northern lights coloring the winter night sky, even though their glow is subtler than in Northern Finland.
Spring (March-May)
In spring, the islands burst into life with blooming wildflowers and the return of migratory birds. The temperatures usually vary between zero and 10 degrees Celsius (32 to 50 degrees Fahrenheit).
Summer (June-August)
During summertime, the Saaristo weather is usually pleasantly warm (15 to 25 degrees Celsius or 59 to 77 degrees Fahrenheit). Summer brings long days, and mild weather, and nature is in full bloom.
The Finnish phenomenon, the nightless nights, occurs during the heart of summer when it doesn’t get completely dark even at midnight.
Autumn (September-November)
Autumn transforms the archipelago colors as the leaves change to shades of yellow and red, offering a stunning show of color.
The warmness of the summer sometimes carries out to the start of September – creating the adored phenomenon of Indian summer. The temperature is typically between zero to 15 degrees Celsius (32 to 59 degrees Fahrenheit).
Winter (December-February)
In winter, the temperatures range between minus five to -20 degrees Celsius (23 to -4 degrees Fahrenheit).
Winter covers the islands in a blanket of frost – perfect for those seeking the solitude of a starry winter night, or an opportunity to explore the beautiful landscape on ice skates or skis.
The Archipelago National Park spans more than 2,000 islands and rocky islets. The park lies in the outer archipelago, in the southern reaches of Saaristo – and can only be reached by sea.
Established to protect the area’s rich biodiversity, it is a part of the UNESCO Archipelago Sea Biosphere Reserve. The National Park is open to visitors year-round.
Explore nature trails in Saaristo
Ruissalo island trail | This 8.7-kilometre trail is located just a stone's throw from Turku. The Kansanpuisto Route will take you around the Ruissalo island covered in lush forests and fields. |
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Haijainen trail in Naantali | A 3.5 km trail starts from Haijainen outdoor centre. The area also features an 18-hole disc golf course. About 1 km from Haijainen, there is a shelter with a firepit, firewood. Notice: parts of the trail can be wet and difficult to traverse, depending on the season. |
Bodö island trail | A 2.5-kilometer route offering insights into Bodö’s cultural history and natural environment, including fishing huts and diverse flora. |
Björkö island trail | Approximately 3 kilometers, this trail showcases traditional archipelago farming landscapes with open meadows and grazing lands. |
Jungfruskär island trail | About 2 kilometers, this trail winds through traditional archipelago landscapes with meadows, forests, and coastal views. |
Örö island trails | Ranging from 3 to 6 kilometers, these trails guide visitors through Örö’s military history and diverse natural habitats. |