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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 May 1 - June 18
SUMMER June 19 - August 20
AUTUMN August 21 - Oktober 8
WINTER October 9 - April 30
RUTERs Travelplanner Oslo / Aker brygge in the summer season

Ticket price list

Information in Norwegian


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