Police are seeking public assistance to help locate a 16-year-old boy reported missing in Brisbane since April 3.

The boy (pictured) who is currently visiting from Tasmania was last seen at the Manly Marina in the early hours of Wednesday morning.

Police hold concerns for his well being as he has not been contactable and is unfamiliar with Brisbane.

He is described as Caucasian in appearance, about 158cm tall with a slim build, short blonde hair and blue eyes.

The boy was last seen wearing a dark hoodie, grey shorts, sand shoes and a backpack.

Anyone with information regarding his whereabouts is urged to contact police.

If you have information for police, contact Policelink by providing information using the online suspicious activity form 24hrs per day at www.police.qld.gov.au/reporting.

You can report information about crime anonymously to Crime Stoppers, a registered charity and community volunteer organisation, via crimestoppersqld.com.au 24hrs per day.

Quote this reference number: QP1900659031 within the online suspicious activity form.