Worst air pollution Perth, today and tomorrow

On 4 August 2026, overall air quality in Perth is medium. AQI is the main air quality indicator at 47.1/100. Pollution peaks around 11:00 PM (NO2: 47.1/100).

On 5 August 2026, air quality conditions in Perth will be worse than today, with PM1 forecast at fair at 30.1/100. Pollution peaks around 7:00 PM (NO2: 50.2/100).

Air quality in Perth is typically at its most challenged during summer bushfire smoke events, especially on still, hot days when fires in the Darling Range or further afield send haze over the city, usually December through March. The Fremantle Doctor sea breeze often helps clear conditions by afternoon even on smoky mornings. Outside fire season, air quality is generally reliable and clear across most of the metropolitan area.

It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.

Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.

During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.