Three people have died after a light plane crashed off South Australia’s south coast.

The aircraft crashed into the ocean at Long Bay, near Goolwa South, about 4.20pm on Friday.

Police have confirmed a 57-year-old man from Morphett vale, a 19-year-old man from Pasadena and an 18-year-old man from Freeling were killed in the crash.

A police helicopter was called in to scour the water for the aircraft, which has now been transported to shore.

The Australian Transport Safety Bureau will join police investigators at the crash site on Saturday.

A light plane has crashed into the ocean off South Australia.A light plane has crashed into the ocean off South Australia. Credit: 7NEWS Emergency services responding to the light plane crash.Emergency services responding to the light plane crash. Credit: 7NEWS

The rescue efforts have been hampered by rough seas, making it almost impossible to launch rescue boats.

The crash occurred at a very popular sightseeing spot with an airstrip at Goolwa and a number of private runways on nearby Hindmarsh Island.

A report will be prepared for the coroner.