A man will face Newcastle Local Court today, charged for allegedly committing act of indecency at Bar Beach.

Police say between Thursday January 18 and yesterday (Monday January 22), a 12-year-old boy went to the beach on Memorial Drive in Newcastle on several occasions with a family member.

The boy allegedly witnessed a man commit two acts of indecency while using the public change rooms.

The 12-year-old then saw the same man on the beach on yesterday at about 1pm and reported the incidents to lifeguards.

Newcastle City LAC officers attended and arrested the 75-year-old man.

He was taken to Newcastle Police Station where he was charged with two counts of commit act of indecency with person under 16 years and refused bail.