Cape Martin Lighthouse is a lighthouse located on Cape Martin near Beachport at the north end of Rivoli Bay in South Australia. It was first lit in 1960. It replaced the Penguin Island Lighthouse whose light apparatus was reused in the new tower. The lighthouse was converted to mains power electricity in 1974. The original tower had a height of 4.5 metres (15 feet). However, the gradual build up of sand dunes obscured the light. This problem was rectified in 1980 when the tower was raised to a height of 12 metres (39 feet).