A man has been found dead with his hands bound by a belt near a nude beach in the Royal National Park south of Sydney.

The body of the 45-year-old was discovered by police in the early hours of Tuesday morning on a walking track to Werrong Beach, near Otford.

The location where a man's body was found. Credit:Illawarra Mercury

Werrong Beach, also known as Hell Hole Beach, is a designated nudist area but is listed on a number of internet sites as an unofficial gay hangout.

Wollongong police were called to the scene about 8.20pm on Monday in response to a triple-0 call reporting a fight at the beach.