Tuggerah Lake is a large coastal saltwater lake located near Wyong on the New South Wales central coast, situated about 90 kilometres north of Sydney. It is connected with the sea through a tidal channel at its southern end known as The Entrance; it is also connected with two smaller lakes, Budgewoi Lake and through that to Lake Munmorah. It is connected with the Tasman Sea through a tidal channel at its southern end known as The Entrance. It is also connected with two smaller lakes, Budgewoi Lake and through that to Lake Munmorah. Tuggerah Lake has a catchment area of 714 square kilometres and a surface area of 81 square kilometres.

The lake adjoins extensive areas of suburban development. Much of the original settlement bordering the lake was oriented towards domestic tourism; with Sydney residents drawn to the area and staying in camp and early cabin-style accommodation clustered around towns of The Entrance and Long Jetty, from there spreading to Toukley on the northern lakeshore. Many towns surround the lake including, but not limited to, Lake Munmorah The Entrance, Killarney Vale, Berkeley Vale, Tumbi Umbi, Wyong, Kanwal, Gorokan and Toukley. Wyrrabalong National Park borders the lake and the sea separating the residential areas of Toukley and The Entrance, and preserves the last significant littoral rainforest on the Central Coast.

Tuggerah Lake is well known for its recreational fishing with species such as luderick, bream, flathead and whiting caught from the shoreline and boats. Prawns can be plentiful over the summer months during the dark of the new moon. Fishing in Tuggerah Lake is generally poor during late winter and early spring, particularly when westerly winds are prevalent. Special purpose markers (coloured yellow) around Terilbah Island and Pelican Island denote areas where net and trap fishing are restricted. Other parts of the lake may have permanent or temporary fishing restrictions in force.