Opossum Bay is a rural residential locality in the local government area of Clarence in the Hobart region of Tasmania. The locality is about 37 kilometres (23 mi) south-east of the town of Rosny Park.
Opossum Bay was gazetted as a locality in 1967. Opossum Bay Post Office opened on 16 January 1942 and closed in 1980. The origin of Opossum Bay's name is unclear. The Derwent River forms the western and northern boundaries, and Ralphs Bay the eastern.
It is located on the South Arm Peninsula on the outskirts of Hobart.
This swim can be part of the 4bridgestoironpot swim found on www.4bridgestoironpot.com.