Wilfred Abrokwa, 30, is described as black, 6ft 1in tall and of slim build. He has a limp and shakes his head whilst walking.
Wilfred, who is autistic, was last seen on Turnpike Lane, N8 at approximately 07:30hrs on Saturday, 19 May.
He was seen wearing a navy blue coat, dark coloured trousers and trainers.
His family and officers are growing increasingly concerned for his welfare.
Anyone who has seen Wilfred is asked to contact officers at Haringey via 101 quoting reference 2416/19May