According to Specialised Security Services, Lee-Ann Labuschagne went missing from her home in Country View Mansions, Piet Retief, on Saturday, 27 September.
Lee-Ann was last seen getting into a dark blue Volvo at 12:00 on the day.
During the last contact with her family, she said she was in Middelburg and on her way home.
Lee-Ann is described as a slim blonde with blue eyes.
Her height is 1.2 metres, and she weighs approximately 45kg.
Her left iris has a patch of brown colour.
She was last seen wearing a pair of black denim shorts, a green bikini top with a white jersey and black flip-flops.
The private investigator handling her disappearance, Mr Danie Louw, confirmed her disappearance and the likelihood that she could be in the Middelburg area.
Anyone with more information is urged to call Mr Louw on 082 282 8032.