Terrigal Lagoon, an intermittently closed intermediate saline coastal lagoon, is located on the Central Coast of New South Wales, Australia. Terrigal Lagoon is located between the towns of Terrigal and Wamberal, and adjacent to the Pacific Ocean, about 85 kilometres north of Sydney.
The lagoon has a surface area of approximately 30 hectares and a catchment area of 8.9 square kilometres. When full, the Terrigal Lagoon covers an area of around 29 hectares.
A large part of the upper catchment area of Terrigal Lagoon is rural land, most of which has been cleared. The lower slopes in the vicinity of the lagoon contain extensive urban development. South and west of the lagoon is the township of Terrigal. The northern part of the catchment includes part of the suburb of Wamberal. A large knoll of land rises from the centre of the catchment separating the two arms of the lagoon.
Wamberal Lagoon and Avoca Lake located to the north and south respectively, are a short distance away.
