The body of a 15-year-old Brody Hurst has been found at Bilgola Beach on Sydney's northern beaches on Friday.

Police are investigating his death, but it is not being treated as suspicious.

Brody was reported missing on Thursday and was last seen at a shop on Barrenjoey Road in Newport about 5.30pm on Thursday.

The body of Brody Hurst, 15, has been found on Bilgola Beach. Credit:NSW Police

"Brody left his bright green pushbike at the northern end of the beach on the walking track near the sand yesterday early evening and hasn't come home," his mother posted on social media on Friday morning.