Perth missing man found after four days

A Perth man who has been missing for four days has been found "in good health".

Steven Allison, 43, left his Clarkson home on August 30, with police finding his car in Ajana, more than 500km north of Perth and east of Kalbarri, on Friday.

Mr Allison was found in the Ajana area on Monday evening, and has been taken to hospital, police say.

"Mr Allison is in good health and has been conveyed to Geraldton for medical assessment," a police statement said.

The police air wing, SES volunteers and police divers came together over the past four days to look for Mr Allison.

Police on Monday were focusing their search efforts in the rough terrain where Mr Allison's car was found.

Divers searched waterways nearby in the afternoon.

Police thanked all those who helped in the search and highlighted the "overwhelming support from the community".