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Oscarsborg Fortress

a national fortification

Oscarsborg Fortress

Oscarsborg Fortress is situated on the Oslofjord and has had the important function of defending the seaward approach to the capital. With its strategic location on an island, Oscarsborg Fortress is a very popular tourist destination, with its own marina and great biological diversity.

Opening hours

The fortress area is open 24/7 all year. Oscarsborg is only accessible by boat. A ferry service runs every day all year from Drøbak to Oscarsborg Fortress. The crossing from Drøbak takes about 10 minutes.


SPRING April 30th - June 17th
SUMMER June 18th - August 12th
AUTUMN August 13th - September 30th
WINTER October 1st - April 29th
RUTERs Travelplanner Oslo / Aker brygge in the summer season

Ticket price list

Buying tickets
Tickets can be bought in the ticket machine on the ferry pier.
Tickets are return tickets. The return ticket can be used for both Drøbak and Sætre. It is not possible to buy tickets on the ferry.
All travellers need to have a valit ticket when boarding the boat.
Children under 3 years travel for free.

Information in Norwegian


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