Suomenlinna from Helsinki: Ferry, Guided Tour and How Much Time to Plan
4 min read
For a first visit, take the HSL city ferry out and join the official one-hour guided walk once you are there, but check the day first: outside June to August the public walk runs only on a few days a week. The ferry alone is enough if you would rather wander the island at your own pace. Suomenlinna is a sea fortress built across six islands just off the city from 1748, and an easy trip from central Helsinki.
Getting there: the city ferry or the water bus
There are two boats from Market Square, and they are not the same ticket. According to HSL, the public ferry runs every day of the year, the ride takes about 15 minutes, and an HSL ticket for zone AB covers it. Tickets must be bought before boarding, not on the boat. There is no entrance fee for the island itself, according to the official Suomenlinna site; you only pay for the boat and for museums. HSL tickets are not valid on the FRS water bus.
The FRS Finland round-trip ticket is the water bus and costs €9.90, with 528 reviews. It leaves from the pier at Market Square next to the Korkeasaari zoo ferry, and the page gives the ride as about 20 to 25 minutes, with at most 30 minutes between departures. Its stated advantage is the Artillery Bay pier, the closest landing to the main sights, and you can return from either Artillery Bay or King’s Gate. The boat has a toilet, a café and indoor and outdoor seating. The same ticket also reaches the restaurant island of Lonna. You can cancel free of charge up to 24 hours before. The water bus is a summer service: the guided walk’s page and the official Suomenlinna site both give May to the end of September, so for the rest of the year the HSL ferry is your boat.
The guided walk and the museums
The official guided walking tour costs €16 and is run by the Ehrensvärd Society, with 97 reviews. It is a public tour in English led by an authorized Suomenlinna guide. The page says the tour starts at the Suomenlinna Museum and lasts 70 minutes, visiting Artillery Bay, the Great Courtyard, Piper’s Park and the Dry Dock. The ticket includes free entry to the Ehrensvärd Museum during its opening hours, and the page says that museum is open daily only from May to August. It adds that the walk from the HSL ferry to the museum takes about 10 minutes. The page lists wheelchair users as not suitable, and asks for comfortable shoes. The tour does not run every day: according to the official Suomenlinna site, public tours are held daily in Finnish, Swedish and English from June to August, and in English only on Fridays and Saturdays in May, September and winter, with Mondays added since January 2026. It also lists ferry tickets in its inclusions, but the list mixes included and excluded items, so check on the booking page whether the boat is part of the price before you buy a separate ferry ticket.
The Suomenlinna Museum ticket costs €10 and covers the museum in the Suomenlinna centre, which presents the island’s history from the 18th century to today. Its booking page says the museum is open all year, with last entry half an hour before closing, and the ticket includes the 25-minute film Suomenlinna Experience, shown every 30 minutes in the museum auditorium. Free cancellation applies up to 24 hours before. The official site says the other museums charge separately and that opening times differ by museum and season, so check suomenlinna.fi for the day you go.
| Option | What it is | Cancellation |
|---|---|---|
| FRS Finland round-trip ferry | Water bus, about 20–25 min, Artillery Bay pier | Free up to 24 hours before |
| Official guided walk | 70-minute walk in English, Ehrensvärd Museum entry | Free up to 24 hours before |
| Suomenlinna Museum ticket | Museum entry with 25-minute film | Free up to 24 hours before |
How much time to plan
The ride is 15 minutes each way on the city ferry, the guided walk is 70 minutes, and the museum is on top of that. I would plan three to four hours for a first visit, including a coffee, because the fortress is spread over several islands and in season the water bus leaves at most every 30 minutes. In winter the city ferry has fewer departures than in summer, so look up the return time in the HSL journey planner before you stay late. For a longer city programme, the Helsinki and Suomenlinna guided tour with ferry takes 5.5 hours: pickup in the city centre, a minibus tour of Helsinki, a short lunch break at Market Square and the Old Market Hall where you choose and buy your own lunch, then the ferry to a guided walk on Suomenlinna, ending back at Market Square. The page lists live guiding in Spanish and English.
Our recommendation
Book the official guided walk if you want the fortress explained, and the FRS Finland ferry if you visit between May and September and want a ticket in your pocket and the shortest walk from the pier. If you simply want to see the island, the HSL ferry and a free afternoon are enough. See all tickets and attractions in Helsinki or the archipelago cruises for other ways onto the water.
