Aerial view of Seili island, its historic buildings and the guest harbour on a summer day.

Seili by rental boat – a day trip in the Turku archipelago

Seili is a historic island in the Turku archipelago, known for its past as a leprosy hospital and a mental hospital. Today the island combines cultural history, protected archipelago nature and visitor services. Day visits are free of harbour fees for boaters, so Seili also works well for a short stop.

Details checked against sources in October 2026.

Services on site

  • Guest jetty
  • Toilet
  • Sauna
  • Restaurant
  • Café
  • Nature trail
  • Laundry
  • Septic emptying
  • Waste disposal

Many services are only open in the summer season, so check opening hours on the destination's website.

Why go to Seili?

Seili has been permanently inhabited since the Middle Ages. In 1619, King Gustav II Adolf ordered a leprosy hospital to be built on the island, as the sick were to be isolated there because of the risk of infection. At least 663 leprosy patients are known to have been cared for on the island. The cruciform log church was built in 1733–1734 and has separate entrances and spaces for patients with leprosy and those without it. The church is surrounded by a cemetery with wooden crosses.

Seili's last leprosy patient died in 1785, after which more and more mentally ill patients were placed on the island. The mental hospital operated on the island until 1962. Visitors have free access to the main building, the former mental hospital, where a patient room left as it was can be seen in the corridor. The former hospital area is a nationally significant built cultural environment, and both the museum church and the hospital buildings are protected.

Since 1964, the island has been home to the University of Turku's Archipelago Research Institute, which studies the Archipelago Sea and the Baltic Sea. The island of about 160 hectares is entirely protected, and most of it belongs to the Natura 2000 network. The central part of the island has a traditional landscape shaped over the centuries, the south has lush groves and hazel bushes and the north more barren coniferous forest. The landscape is maintained by mowing and by grazing sheep and cows. On the island you can see, for example, maiden pinks and red admiral butterflies, and a pair of ospreys nests on the island every year.

Seili's historic main building on a summer day. Photo: Visit Seili.
Seili's historic main building. Photo: Visit Seili.

Route to Seili

Departure point
Hovirinta departure point: address, parking and refuelling

Hovirinta → Seili

Distance / one way
19 nm
Travel time / one way
approx. 55 min
Fuel / one way
approx. 14 l
Fuel / round trip
approx. 28 l

The fuel estimate is based on a consumption of 0.75 l/nm. Actual consumption depends on the weather, load and driving style.

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Travel times are estimates without stops and depend on the conditions. The round-trip fuel estimate assumes you return the same way. Also allow time for the destination itself and for the boat handover and safety briefing of approx. 30 minutes at the start of the rental.

Wind forecast: Seili

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Back to the Seili route on the home page

How to spend the day on Seili

This is a flexible idea for a relaxed, self-guided day trip to Seili.

  1. 01

    Collect the boat from the agreed place and get a boat handover and safety briefing of about 30 minutes.

  2. 02

    Make the crossing to Seili taking into account the weather, other traffic on the water and your own boating experience.

  3. 03

    Moor at the Post or Church jetty intended for day visitors, following the harbour's instructions.

  4. 04

    Visit the main building and the church, join a guided tour or walk the island's marked trails.

  5. 05

    In the summer season, have lunch at the Restaurant Seili buffet or stop for a picnic.

  6. 06

    Set off on the return trip in good time before the agreed return.

Map: Seili – paths and roads and the harbour.
The map shows paths and roads and the harbour. Map data © OpenStreetMap contributors (ODbL), dashed lines and harbour location based on our routes.
The summer courtyard of Seili's historic hospital area, with white tables and chairs and people enjoying the sun. Photo: Visit Seili.
People sitting on a rocky shore on Seili with a sea view. Photo: Visit Seili.
A curious calf in a pasture on Seili. Photo: Visit Seili.
A rainbow over Seili in autumn colours and a red building. Photo: Visit Seili.
Photos: Visit Seili.

Arrival and harbour rules

Seili is free for day visitors: no harbour fee is charged to boaters visiting during the day. This makes Seili an easy destination for a short stop and a walk. Day visitors are asked to use the Post jetty (Postilaituri) and the Church jetty (Kirkkolaituri). Check the current harbour instructions on the Visit Seili website.

Seili has three harbours. Day visitors are asked to use the Post and Church jetties, where the depth is about 1.5–2 metres. Moor your boat according to the harbour's instructions. The buoy berths at the Post jetty are reserved for the ferry and must not be used, and mooring at the wooden ferry jetty is not allowed without special permission. Boats staying overnight are directed to the Station jetty (Asemalaituri).

Harbour rules apply in the harbour area: the speed limit is 5 knots, swimming in the harbour basin is not allowed, open fires and barbecues are prohibited in the harbour area and on boats, and cycling on the jetties is not allowed. Waste is sorted in the waste shelter.

Boats moored at the jetties of Seili guest harbour. Photo: Visit Seili.
The guest harbour jetties. Photo: Visit Seili.

Services, sauna and food

The guest harbour is open almost all year round, and the island's other services are open daily in the summer season and at weekends in May and September. The harbour service building has toilets, dishwashing facilities and washing machines, and there is a floating septic station next to the Station jetty. The sauna is available during public sauna hours, and private sauna slots can be booked.

Restaurant Seili serves a buffet lunch that always includes a vegetarian option, and there is also a café and a bistro. Guided tours are organised on the island, as well as kayaking and traditional peasant boat sailing trips, for example. Check opening hours, prices and bookings on the Visit Seili website.

A red boathouse reflected in calm water on Seili. Photo: Visit Seili.
Photo: Visit Seili.

Accommodation on Seili

On Seili you can stay, for example, in the historic hospital buildings or in a cottage of your own, and pets are welcome in many of the places to stay.

Boats staying overnight are directed to the Station jetty (Asemalaituri). In summer the Station jetty has three berths that can be booked in advance in the Visit Seili online shop. Otherwise berth availability cannot be guaranteed in advance.

When you rent the Buster Magnum from us for several days or even a week, you can stay the night and continue your trip the next day. Book accommodation directly with the provider.

A wooden jetty and the setting sun on Seili on a summer evening. Photo: Visit Seili.
A summer evening on Seili. Photo: Visit Seili.

Before you set off

  • Use the Post or Church jetty for a day visit and leave berths reserved for the ferry free.
  • Check restaurant, guided tour and sauna opening hours and bookings on the Visit Seili website.
  • Bring drinking water, snacks and suitable walking shoes.
  • Stay on marked paths, do not pick plants and keep dogs on a lead.
  • Check the weather and allow time for the return journey.

Book the boat for your trip to Seili

Choose a suitable day for the trip and book the Buster Magnum on Friilo. If you would like to think through the departure point or the pace of the day before booking, ask us for tips.

Friilo may open in Finnish – you can easily switch the language on the page.