Swinger Bay is a bay on the north west shore of Milne Bay, Papua New Guinea. Named by John Moresby after HMS Swinger. It is also known as Stringer Bay.
Swinger Bay was selected as a site for an amphibious training centre in 1943 during World War II, which relocated from HMAS Assault, Port Stephens, Australia. Construction started in late 1943 by a detachment of the 91st Naval Construction Battalion (Seabees), who were relieved by 105th Naval Construction Battalion in January 1944.
The amphibious training centre consisted of housing for 1,500 men in quonset huts and developed 2,000 feet (610 m) of waterfront for training purposes.
In March 1945, the amphibious training centre closed and relocated to Subic Bay, Philippines.