Jean Lea is believed to have left her home address on Meadow View Road shortly before 3am today, 26 March 2017.
She is described as white, five feet eight inches tall and of slim build. She has short blonde-coloured hair and it is believed she may have left the house wearing night clothes.
Chief Inspector Wayne Nock, of Dorset Police, said: “We are becoming increasingly concerned for the welfare of Jean as we believe she has been confused recently.
“I am appealing to anyone who knows where she may be, or has seen a woman matching her description, to please contact Dorset Police as soon as possible.
“If Jean sees this appeal, please get in touch with your family or police as we all want to ensure you are safe and well.”
Anyone with information or knowledge as to Jean’s whereabouts is asked to contact Dorset Police at www.dorset.police.uk, via email firstname.lastname@example.org or by calling 101, quoting incident number 26:36. Alternatively contact Crimestoppers anonymously on 0800 555 111 or via www.crimestoppers-uk.org.