Adventfjorden (
Advent Bay) is a 7 km long and 4 km wide bay on the southern side of
Isfjorden, on the west coast of
Spitsbergen. The name is a corruption of
Adventure Bay, which was probably named after the
Hull whaleship
Adventure, which resorted to Isfjorden in 1656. The fjord was originally known as
Klass Billen Bay. At the head of Adventfjorden is
Adventdalen.