Kahvankari is a small uninhabited island in the Finnish sector of the Bay of Bothnia offshore from the city of Oulu.

[1] The island and surrounding water is part of a nature reserve.

[2] The island is mainly covered with mixed forest, and its beaches are rocky.

North of the island is a sand bar that stretches up to Kellon Kraaseli.

Sea birds nest on the island, including the Ruddy turnstone (Arenaria interpres).