Cruises on M/S Kerttu
THE BEST DAY IS A DAY AT SEA
Cruises on M/S Kerttu are organised in Uusikaupunki during the open water season. On board Kerttu, you can cruise to the lighthouse island or do a sightseeing tour of the archipelago. Kerttu is also available for chartered cruises.
From June to August, Kerttu sails to the Isokari lighthouse island on a regular schedule. The Isokari cruise includes, in addition to the return trip, lunch and a guided tour of Isokari as well as access to the lighthouse. There are also cruises from Kustavi to Isokari in July.
On Fridays during high summer, Kerttu does sightseeing tours of the inner archipelago: on the 2-hour evening cruise, you can enjoy the relaxing sea, fun programme, and Kerttu’s summery treats. The ship is fully licensed to serve alcohol.
Tickets for a trip to Isokari can be booked online. Tickets can also be purchased directly from the ship on the day of the trip if there is room left. For the sightseeing trip on Friday, you can buy your ticket directly from the ship.
Kerttu’s departure pier is at the city guest harbour, right behind Pakkahuone, address Pakkahuoneenkuja. Welcome!
Tickets and bookings
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facebook twitterbirdCruises to the Isokari lighthouse island from Uusikaupunki
Cruises on M/S Kerttu in 2026
Cruises from Uusikaupunki to the Isokari Lighthouse Island
In May, see: www.isokari.fi
June–August: Wednesday–Sunday (Wed, Thu, Fri, Sat, Sun)
4–13 Sept: Friday, Saturday, Sunday
19–27 Sept: Saturday and Sunday
Departure from Uusikaupunki at 10:30, arrival at Isokari approx. 12:00.
Departure from Isokari at 16:00, return to Uusikaupunki approx. 17:30.
Midsummer Eve cruise 19 June at 15:00–22:30
Midsummer Day 20 June at 10:30–17:30
International Lighthouse Weekend 15–16 Aug
Yoga weekend 21–23 Aug
Night of the Ancient Fires evening cruise 29 Aug at 16:00–23:00
Prices: Adults €93, children 4–12 yrs €40 (incl. Little Captain activity book), under 4 yrs free.
Price includes sea transport, guided island tour, entrance to the lighthouse, and lunch on Isokari.
Cruises from Kustavi to Isokari Lighthouse Island
Sat 27 June at 14:30–20:00
In July Wed & Sat at 14:30–20:00
In August until 16 Aug Wed & Sat at 14:30–20:00
Departure from Lootholma, Kuninkaantie 193, Kustavi.
Prices: Adults €93, children 4–12 yrs €40, under 4 yrs free.
Price includes sea transport, guided island tour, entrance to the lighthouse, plus coffee and a sandwich on Isokari.
Birdwatching cruises to Isokari
3 May, 17 May, 31 May, 7 June
Departure from Uusikaupunki at 9:00, return at 17:30.
Prices: €93 / adult, €40 / child (4–12 yrs)
Seal safaris to the Sandbäck seal reserve
14 May, 16 May, 23 May, 13 June
Departure from Uusikaupunki at 9:00, return approx. 17:30.
See travel packages: merikauppa.isokari.fi
Prices: Adults €140, children under 12 yrs €60.
Price includes sea transport Uki–Sandbäck–Isokari–Uki, morning coffee on board, lunch on the island, entrance to Isokari Lighthouse, and guided tours en route and on the island.
Friday guided sightseeing cruises
26 June, 10 July, 17 July, 24 July, 31 July at 18:00–20:00
Guiding by Uusikaupunki tourist guides.
Tickets from the Sea Shop or the ship: €20 / €10.
Saturday evening cruises
A relaxed evening at sea with programme.
27 June, 11 July, 18 July, 25 July
1 Aug, 8 Aug, 15 Aug at 18:00–20:00
Tickets from the Sea Shop or the ship: €20 / €10.
Ticket sales: www.isokari.fi, tel. +358 40 1866 350
Up-to-date information: merikauppa.isokari.fi
