Ourimbah Creek is a perennial stream of the Central Coast catchment in New South Wales, Australia. Ourimbah Creek rises on the southern slopes of the Hunter Range, about 1.6 kilometres south of Kulnura. The river flows generally south southeast and east northeast, before reaching its mouth within Tuggerah Lake, about 4.8 kilometres southeast of Tugg…Ourimbah Creek is a perennial stream of the Central Coast catchment in New South Wales, Australia. Ourimbah Creek rises on the southern slopes of the Hunter Range, about 1.6 kilometres south of Kulnura. The river flows generally south southeast and east northeast, before reaching its mouth within Tuggerah Lake, about 4.8 kilometres southeast of Tuggerah. The river descends 304 metres over its 37-kilometre course.