The mother of an Auckland 20-year-old who has been missing for more than a week is begging the public to keep searching for her boy.

Tyler Porter was last seen on Wednesday, July 16 in the Arkles Bay area and both his family and police have serious concerns for his welfare.

He was last seen wearing black shorts, a white T-shirt, black DC shoes and a black hat and has been described as having brown hair and distinctive blue eyes.

A recent photograph of Tyler Porter, with a haircut. Photo: NZ Police / SUPPLIED

His mum, Shara-Lee Porter, said her son had last been seen at 4.35pm that day at the top of Ladies Mile Rd crossing over into a walk way.

"Please everyone don't stop searching, sharing our social media post and showing his photo," she said.

Porter was tall, standing at six-foot-four, gentle, and much-loved by the local community, his mum said.

Tyler Porter has been described by family as a tall and gentle young man. Photo: SHARA-LEE PORTER / SUPPLIED

"We just want to give him a big tight hug. Myself, his dad, little brother, grandparents, everyone just wants our baby home."

Police asked anyone who had seen Porter or who had heard from him to call 111 and use the reference number 250719/0868.