Mosman Bay Marina is a boutique boating facility situated on scenic Mosman Bay, Sydney Harbour. The marina offers 35 berths accommodating vessels ranging from 8 to 30 metres in length, built on an economical Pacific floating concrete pontoon system.

Berths are equipped with power and water services, and the facility includes a sewage pump-out station and service jetty.

Located at 1 Centenary Drive, Mosman, the marina is family-owned and operated, with a reputation as a well-regarded local boating destination on one of the world's most celebrated harbours.

A public boat ramp at Mosman Bay provides additional waterway access nearby.