Police are appealing for public help to locate a Ballina woman who has not been seen since the weekend.

Emma Davis, 46, was last seen at East Ballina about 6pm on Saturday, March 7.

She has now been missing for four days, including through periods of heat and rain, raising concerns for her welfare.

Officers from Richmond Police District were notified after Emma failed to return home and could not be contacted.

Police and family are urging anyone who may have seen her to come forward.

Emma is described as Caucasian, about 170cm tall, with a thin build, blue eyes and shoulder-length blonde hair.

She was last seen wearing a black dress and no shoes.

Anyone with information about her whereabouts is urged to contact Ballina Police or Crime Stoppers on 1800 333 000.