Broken Bay

Broken Bay
Aerial photograph showing the mouth of Broken Bay as it flows into the Tasman Sea, as seen looking across Sydney's North Shore and Northern Beaches
Broken Bay is located in New South Wales
Broken Bay
Broken Bay
LocationCentral Coast, New South Wales, Australia
Coordinates33°34′07″S 151°19′00″E / 33.56861°S 151.31667°E / -33.56861; 151.31667
TypeBay[1]
Primary inflowsHawkesbury River, Brisbane Water, Pittwater
Surface area17.1 km2 (6.6 sq mi)
Average depth9.8 m (32 ft)
Water volume0.17 km3 (0.041 cu mi)
IslandsLion Island
WebsiteNSW Environment and Heritage webpage

Broken Bay, a semi-mature tide-dominated drowned valley estuary,[1] is a large inlet of the Tasman Sea located about 50 kilometres (31 mi) north of Sydney on the Central Coast of New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast. Broken Bay is the first major bay north of Sydney Harbour in the state capital of Sydney.

Broken Bay has its origin at the confluence of the Hawkesbury River, Pittwater, and Brisbane Water and flows openly into the Tasman Sea.

The total surface area of the bay is approximately 17.1 square kilometres (6.6 sq mi).

  1. ^ a b Roy, P. S.; Williams, R. J.; Jones, A. R.; Yassini, I.; et al. (2001). "Structure and Function of South-east Australian Estuaries". Estuarine, Coastal and Shelf Science. 53 (3): 351–384. Bibcode:2001ECSS...53..351R. doi:10.1006/ecss.2001.0796.