Family plead for return of Perth woman

The family of a missing woman whose car was found at a Perth beach have made an emotional plea for her to contact them.

Robyn Santen's family say they have not heard from her since Saturday night.

The 36-year-old woman's car was found parked at City Beach on Sunday.

"We all miss you so much," her husband Troy said via the media on Monday.

"Robyn, if you're out there somewhere, or if someone's seen Robyn, please just contact police," her brother Andrew Paton added.

Ms Santen's sister-in-law Emma Donnelly wept as she pleaded for her to return home.

"We really love you and we miss you and we want you to be here," she said.

Boats, jet skis and aircraft are being used to search an area of ocean covering about 65km off the coast.