Before he leaves, he touches his victims. In one case, he grabbed a woman's bottom.
Police warn residents to keep their doors and windows locked.
The suspect is described as a white man in his 30s, 5'10" tall, 200 pounds, and unshaven. He was last seen wearing a blue or white t-shirt, shorts, white socks and white tennis shoes.
Anyone with information regarding the suspect is asked to call Newport Beach Police at (800) 550-6273.