French Island is situated in Western Port Bay, about 70 km south-east of Melbourne. Phillip Island lies to the south at the entrance of the bay. French Island is approximately 20 km long and 14 km wide and covers 154 sq km. Much of the coastline is surrounded by mangroves, and natural heathland covers a large part of the island. The highest point is Mount Wellington, 96 metres above sea level. There are two settlements, Tankerton and Fairhaven, on the western side of the island.