The Parks and Wildlife Service at the Department of Biodiversity, Conservation and Attractions has issued a smoke alert for the southern suburbs of Perth to Mandurah extending east to Jarrahdale.
The smoke is the result of prescribed burns being carried out by the department and private property owners.
The Department of Biodiversity said smoke is expected to clear overnight.
Motorists are advised to turn on headlights if visibility is reduced due to smoke.
If smoke is particularly thick residents are encouraged to turn off air-conditioners.
Fish attractant buoys deployed off WA coast to help boost recreational fishing
Newly redeveloped Stan Twight Reserve Clubrooms unveiled
WATCH: Police hunt arsonist who set cars alight in Port Kennedy
Cold Case detectives ask for public assistance into Halls Head car theft, shots fired incident
Man dies in Warnbro crash
Detectives release CCTV after four cars firebombed in Greenfields, Dudley Park
Pop trio Sheppard to headline New Year's Eve celebrations in Rockingham
Man charged over alleged stabbing of teen near Rockingham Train Station
Western Foreshore development: State Government community feedback period now open