Warnbro nudist beach in spotlight

Warnbro Free Beach has attracted the attention of police after reports exhibitionists used an online forum to organise public sex at the nudist beach.

Acting Senior Sergeant Dayna Rigoir said police teams were investigating after information came to light about the forum, which outlined beach visitors' intentions to commit indecent acts in sand dunes and elsewhere on the beach.

A series of posts to a forum website - predominantly used by men looking for consenting female partners from across the Perth metropolitan area - discusses apparent beach etiquette, including the signals needed to identify interested women or couples.

In the posts, the most recent added on December 2, users refer to areas of beach where indecent acts are likely to take place.

One user advises visitors to "walk about 100m to where the wire fence along the dune stops - at this point to the end of the nudie beach is the playing area".

Another user, purporting to be of Atlanta, Georgia, asserts that he will be "in the dunes".

One presumable female user, who goes by a moniker, promises to visit the beach and meet strangers with her husband.

Mayor Barry Sammels said the beach's nudist status, which was granted to the stretch of beach at Bayeux Avenue in Port Kennedy in 1988, allowed beachgoers to swim and sunbathe naked.

But, Cr Sammels said the status did not apply to the adjacent sand dunes.

"Other than the right to wear no clothing, visitors to the free beach are required to conduct themselves as they would at any other public beach," Cr Sammels said.

"Nudity is allowed, however sexual activity in public, including the free beach, is a contravention of the WA criminal code."

Cr Sammels said City rangers regularly patrolled the beach.