Port Noarlunga is a suburb in the City of Onkaparinga, South Australia. It is a small sea-side suburb, population 2,632, about 30 kilometres (19 mi) to the south of Adelaide and was originally created as a sea port. This area is now popular as a holiday destination or for permanent residents wishing to commute to Adelaide or work locally. There is a jetty that connects to a 1.6 kilometres (0.99 mi) long natural reef that is exposed at low tide.