The islands of the Bothnian Sea National Park are only accessible by boat. There are various companies in Uusikaupunki, Kustavi, Rauma, Luvia, Pori and Merikarvia that arrange boat transports to the islands. The boat harbours in Uusikaupunki, Rauma and Pori have bus access.

Bus schedules are available on Matkahuolto’s timetable service (matkahuolto.fi), Rauma local services (koivistonauto.fi, in Finnish) and Pori public transport (pjl.pori.fi).