Hailuoto island is in the northernmost part of the Baltic Sea, the Bothnian Bay, about 50 kilometres from Oulu. The lighthouse is on the westernmost part of the island, in the village of Marjaniemi, and there have been different signs for sailors in this area since 1770. There is a pilot station near the lighthouse, built in 1962, and in the same building there is the Bothnian Bay Research Station of University of Oulu. The lighthouse got its light on in 1872 and nowadays the light can be seen from 30 kilometres away. The lighthouse is 25 m high and the light is 30,2 m from the sea level. During the summer season you can go up the stairs with a tour guide.