Surry River estuary
The Surry River estuary is a seasonally closed, salt wedge estuary that extends approximately 10 kilometres upstream from the mouth at Narrawong. Water depth in the Surry estuary is highly variable. At its deepest spot, the Surry estuary is only 4.2m deep, with much of the estuary less than 1.3m deep.
The estuary supports a range of plant and animal species. A total of 154 species of birds have been observed including 13 species listed under the State Flora and Fauna Guarantee Act 1988 and numerous migratory species.