Kiama Blowhole

Kiama Blowhole is a large natural blowhole at Blowhole Point in Kiama on the New South Wales South Coast, about 120 km south of Sydney. Formed in basalt from ancient Gerringong volcanic flows, it is regarded as one of the largest blowholes in the world. When south-easterly swells enter the sea cavern, compressed air forces water up to 25 metres high, creating a dramatic coastal spectacle within a managed headland reserve.

Visitors can expect a coastal headland reserve with fenced viewing platforms overlooking the blowhole cavern and Tasman Sea. The blowhole erupts intermittently depending on swell direction, tide and wind, with water jetting through the basalt opening. The surroundings include grassy parkland, the Kiama Lighthouse, paved coastal walk paths, picnic areas and expansive ocean views. Visitors can walk around Blowhole Point, photograph eruptions, watch seabirds and seasonal whales, and explore the adjacent harbour and beaches.

First noted by European explorer George Bass in December 1797 during his whaleboat voyage along the New South Wales coast. The blowhole was formed over thousands of years by erosion of basalt columns from the Gerringong volcanic flows. Kiama developed as a basalt quarrying and dairy port in the 19th century, and the blowhole became a promoted tourist attraction by the late 1800s with viewing infrastructure added over time.

The area is on Country of the Wodi Wodi people of the Dharawal nation. The name Kiama is commonly attributed to the Dharawal word Kiarama meaning 'place where the sea makes a noise', referencing the sound of the blowhole. The site remains a significant natural landmark valued for its connection to coastal Country and as a focal point for community and tourism on the South Coast.