Gold Coast Broadwater
The Gold Coast Broadwater, also known as Southport Broadwater and Gold Coast Harbour, is a large shallow estuary of water reaching from the locality of Southport to the southern section of the World Heritage Listed Moreton Bay along the eastern coast of Australia. Separated from the ocean by the a thin strip of land called Stradbroke Island, the original body of water was a lagoon created from water deposited from the Nerang River. It was Captain Patrick Logan that first discovered this southern entrance to Moreton Bay.

The entrance of the Nerang River was at Main Beach in the late 19th century but by the 1980s had moved about 6 km northwards. The Gold Coast Seaway was completed in 1986 to stabilise the location of the Nerang River Entrance. Towards the northern end of the broadwater the Pimpama River enters.
The broadwater is very large and contains lots of species of marine life.