Justin Painter was last seen at his home in Mosman.

Justin Painter has returned home.

A Sydney teenager missing since the weekend has returned home in good health.

Officers from Harbourside Local Area Command launched an investigation after Justin Painter, 15, was reported missing after midday on Sunday.

Police say he boarded a ferry at Mosman shortly after he went missing.

He returned to his Mosman home about 10am on Tuesday.

Police said the boy returned of his own volition.

AAP, smh.com.au