Worst air pollution Perth, today and tomorrow
Today (17 September): Air quality in Perth is fair. AQI, PM2.5, NO2, and O3 are fair; PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (PM2.5: 26.8/100).
Tomorrow (18 September 2026): Air quality in Perth is fair. NO2 decreases to good; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 3:00 PM (PM2.5: 25.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Perth generally enjoys good air quality, helped enormously by the reliable afternoon sea breeze known locally as the Fremantle Doctor, which ventilates the city on most days through the warmer months. The main seasonal challenge is bushfire smoke during the hot, dry summer (December-March), when fires in surrounding jarrah forest or the hills can affect the metropolitan area. Traffic-related pollution is otherwise the main urban contributor.
Today - 17 September | Pollution peaks at 22:00
AQI:
Fair
26.8/100
PM2.5 (fine particles):
Fair
26.8/100
PM10 (coarse particles):
Good
13.0/100
NO2 (nitrogen dioxide):
Fair
26.1/100
O3 (ozone):
Fair
21.4/100
SO2 (sulfur dioxide):
Good
2.5/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
6.5/100
PM1 (ultrafine particles):
Good
13.0/100
Levels show the poorest local air quality during the day
Tomorrow - 18 September | Pollution peaks at 15:00
AQI:
Fair
25.0/100
PM2.5 (fine particles):
Fair
25.0/100
PM10 (coarse particles):
Good
14.3/100
NO2 (nitrogen dioxide):
Good
18.8/100
O3 (ozone):
Good
19.3/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
10.9/100
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Frequently Asked Questions
Is air quality bad in Perth right now?
On 17 September 2026, overall air quality in Perth is fair. AQI is the main air quality indicator at 26.8/100. Pollution peaks around 10:00 PM (PM2.5: 26.8/100).
Will air quality be worse tomorrow in Perth?
On 18 September 2026, air quality conditions in Perth will be similar to today, with AQI forecast at fair at 25.0/100. Pollution peaks around 3:00 PM (PM2.5: 25.0/100).
When is air pollution at its worst in Perth?
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.
Are air quality levels in Perth based on measurements or forecasts?
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.
Why doesn’t the forecast always reflect wildfire impacts?
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.
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Data provided by Airmine — Last update: 17 September 2026 at 03:00 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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