Amanda Waugh was last seen in the Ramsgate Road area of the town, near the junction with Shottendane Road, at around 4.15pm on Saturday 3 July.
The 53-year-old is described as being around 5ft 3ins tall with a slim build and long blonde hair that is worn in a bun.
Anyone with information is asked to call Kent Police on 101 quoting 03-1039.
