Port Phillip (also commonly referred to as
Port Phillip Bay or (locally) just
The Bay), is a large
bay in southern
Victoria, Australia; it is the location of
Melbourne. Geographically, the bay covers and the shore stretches roughly . Although it is extremely shallow for its size, most of the bay is navigable. The deepest portion is only , and half the region is shallower than . The volume of the water in the bay is around .