Wonboyn River

The Wonboyn River, an open youthful wave dominated barrier estuary or perennial stream, is located in the South Coast region of New South Wales, Australia.

Course and features
Wonboyn River is formed by the confluence of Narrabarba Creek and Watergums Creek, within Beowa National Park, east of the Princes Highway and southeast of the locality of Kiah, approximately 3 km north of Timbillica Hill. The river flows generally east, northeast, and then southeast, joined by one minor tributary, flowing through Wonboyn Lake, before reaching its mouth within Disaster Bay, at the Tasman Sea of the South Pacific Ocean southeast of Green Cape. The river descends 44 m over its 18 km course.

The catchment area of the river is 335 km2 with a volume of 9809 ML over a surface area of 4.2 km2, at an average depth of 2.7 m.