The brother of a Beechmont woman missing for nine days made an emotional public appeal for help this morning.

Tina Louise Greer, 32, was last seen at a Beechmont Road residence in the Gold Coast Hinterland at 2pm on Wednesday January 18.

It is believed she drove to the Aratula area to visit her boyfriend,  who police today confirmed is affiliated with outlaw motorcycle gang OMCG.

Adam Greer said his family, including Ms Greer's 13-year-old daughter, were distraught.

"We just want to make an appeal to the public, we're very worried about our sister and if anyone can help out that would be really good," he said.

Police divers are scouring several waterways and dams on a property off Spicers Gap Road today, after Ms Gree's car was found locked and abandoned at Governor's Chair Lookout last Sunday.

Ms Greer is described as being of Caucasian appearance, 178cms tall with a proportionate build, blue eyes and blonde hair.

At the time of her disappearance she was wearing a long bright floral dress over a brown/orange off-the-shoulder singlet and leather slip-on sandals.

Anyone with information should call Crimse Stoppers on 1800 333 000