Smiths Lake is an intermittently closed youthful saline coastal lagoon on the mid-north coast of New South Wales, approximately 274 kilometers north of Sydney. With a surface area of 10 square kilometers and an average depth of 2.4 meters, this coastal lake is fed by local creeks like Wamwarra and Tarbuck Creeks. It is separated from the Tasman Sea by Sandbar Beach and is only opened to the ocean by council intervention when water levels are high enough to pose a flooding risk. The lake is part of the Port Stephens–Great Lakes Marine Park, with much of its shoreline remaining undeveloped and bordered by national parks, making it a scenic destination renowned for its abundant fishing and boating.