You Do Need power plug adapter while traveling from Norfolk Island to Åland Islands.

Here is Why You Need An Adapter

The outlet and plug type used in Åland Islands are C and F and in Norfolk Island is I. This is how they look like.

Norfolk Island

In Norfolk Island, outlets of type I are in use.

Type I

Åland Islands

In Åland Islands, outlets of type C and F are in use.

Type C

Type F