Seaforth is a suburb of Northern Sydney, in the state of New South Wales, Australia. Seaforth is located 12 kilometres north-east of the Sydney central business district in the local government area of Northern Beaches Council and is part of the Northern Beaches region.

Mosman is a suburb on the Lower North Shore region of Sydney, in the state of New South Wales, Australia. Mosman is located 8 kilometres north-east of the Sydney central business district and is the administrative centre for the local government area of the Municipality of Mosman.