The 43-year-old was last seen on Cleeland Street in Dandenong about 11am on 10 June.
Bouy is described as 155cm tall with a thin build and short black hair.
Police and family hold concerns for her welfare due to the length of time she has been missing.
She is known to frequent the Dandenong, Noble Park and Springvale areas.
Anyone with information about Bouy is urged to contact Dandenong Police Station on (03) 9767 7444.