Sellicks Beach Staircase, South Australia: Sellicks Beach is at the southern most point the City of Onkaparinga and is where the Mount Lofty Ranges meet the sea. . Beautiful Sellicks Beach offers steep cliffs that give way to a long expanse of white sand.. Sellicks Beach, formerly spelt Sellick's Beach, is a suburb in the Australian state of South Australia located within Adelaide metropolitan area about 47 kilometres from the Adelaide city centre. It is an outer southern suburb of Adelaide and is located in the local government area of the City of Onkaparinga at the southern boundary of the metropolitan area. Wikipedia













