Sandbrook Inlet Marina is a modern floating marina located at 87 Brooklyn Road, Brooklyn, approximately one hour north of Sydney. Situated on Sandbrook Inlet, it serves as a convenient access point to the lower Hawkesbury River and Cowan Creek.

The marina offers 88 berths with power and water, 23 swing moorings with free dinghy storage, and a slipway rated to 15 tonnes.

Unleaded fuel is available on the wharf for marina clients, and an on-site mechanic provides inboard and outboard mechanical services. The facility also operates as a Mercury outboard dealership and offers boat detailing and repair services.