Seventeen-year-old Kian Quinn had last been seen at around 9:45pm on Wednesday 15 January 2020 at his home address in Bronte Avenue.
Following appeals by Dorset Police, Kian was found in Bournemouth early on Friday morning.
Searches for the teenager were aided by Dorset Search and Rescue on Thursday, the day he was reported missing.
Dorset Police said: “We would like to thank everyone who shared our appeal.”
Miss Dorset helping save Australia’s wildfire