Batemans Bay is an open oceanic embayment that is located in the South Coast region of New South Wales, Australia. The bay forms the mouth of the Clyde River and its primary outflow is to the Tasman Sea of the South Pacific Ocean.

Batemans Bay is fed by the Clyde River and its tributaries, drawing its catchment from the eastern slopes of the Budawang Range and the Great Dividing Range from within the Budawang, Clyde River, Bimberamala, and Monga national parks. Cullendulla Creek also flows into Batemans Bay, between the townships of Surfside and Longbeach, west of Square Head