A sea made of thousands of islands
The Finnish Archipelago Sea is one of the densest island landscapes on earth. Around 23,000 islands and skerries sit tightly between the Finnish mainland, the Sea of Aland, the Gulf of Bothnia and the Gulf of Finland, and the wider south-west coast has more than 40,000 islands.
The area is large, but its feeling changes constantly: sheltered reeds and forested islands close to the mainland, village islands with ferries and summer cottages, then lower granite skerries and open horizons toward the outer archipelago.
Brackish Baltic water
The Archipelago Sea is part of the Baltic Sea, so the water is brackish rather than ocean-salty. Its salinity is low compared with the Atlantic, which affects the fish, plants, ice conditions and the way the sea behaves through the seasons.
For kayaking this means a very particular environment: sea navigation and real weather exposure, but also narrow sounds, calm lee shores and route choices that can often be adapted during the day.
Inhabited island culture
This is not wilderness in the empty sense. The Archipelago Sea has long been inhabited by fishermen, pilots, farmers, ferry operators, lighthouse communities and summer residents. Many southern islands have Swedish-speaking history and many communities are bilingual, while the northern archipelago is more Finnish-speaking.
Villages such as Rosala, Hitis, Hogsara, Noto, Aspo, Jurmo and Uto give the sea its human rhythm. Kayakers move through a living cultural landscape, not only through scenery.
Archipelago National Park
Archipelago National Park was established in 1983 to protect the nature and traditional landscapes of the outer archipelago. Its cooperation area contains thousands of islands and skerries, but not every island inside the outer boundary is state-owned park land.
That distinction matters. Some islands are protected, some are private, some have services, and some have seasonal landing restrictions. A good kayaking route respects nature conservation, local ownership, nesting birds, weather and safe landing options at the same time.
Birds, seals and nesting peace
The islands are important for birdlife, with more than a hundred bird species found in the area. Sea eagles are now a common sight, ospreys are possible, and the outer archipelago is also seal country.
During nesting season, landing on some islands is prohibited or should be avoided. A responsible paddler observes wildlife from a distance, keeps noise low near bird islands and treats small skerries as living habitats rather than convenient lunch platforms.
Camping, fires and Everyman’s Rights
Finland’s Everyman’s Rights allow broad access to nature, but they do not apply in the same way inside national parks and protected areas. In Archipelago National Park, camping is only allowed at permitted camping sites, and open fires are only allowed at maintained campfire sites when no fire warning is in force.
There is limited waste management on islands, so rubbish must be carried out. Firewood should be used sparingly, and all traces of a stop should be smaller when leaving than when arriving.
Weather and water safety
The Archipelago Sea is beautiful because it is real sea. Water temperatures can be cold well into June, summer winds can shift the character of a day quickly, and autumn conditions can become demanding. Sheltered inner routes and exposed outer crossings are very different paddling environments.
Aavameri route planning always starts with safety: wind direction, landing options, group ability, rescue skills, water temperature, boat traffic and realistic daily distance. The best itinerary is the one that can be adjusted without losing the experience.
Planning a kayaking route
Services are sparse once you leave the mainland and larger ferry islands. Water, food, shops and transport must be planned before departure, especially on multi-day self-guided expeditions.
Good route design balances island character with practical logistics: where to launch, where to refill water, where to camp legally, where the group can shorten a day if wind rises, and where the most memorable paddling will still be possible.
Aavameri’s low-impact rule
A simple standard works well in the archipelago: watch animals from far enough away, carry out all waste, wash dishes with biodegradable soap at least 30 metres from the sea, and leave every landing place better than it was on arrival.
That is why Aavameri treats the Archipelago Sea as the core of the experience. The goal is not only to move through the islands, but to understand how to belong there briefly and lightly.
Aavameri does not only take you kayaking. Aavameri helps you understand the sea.
Aavameri Sea Kayaking