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Perth air quality

Western Australia, Australia · Live AQI and hourly forecast for the next 5 days · updated Sun 07:00 local time

17

Good

US AQI, mostly PM2.5

Great air. A perfect time to be outside.

Next 24 hours
16–47US AQI, highest around Mon 05:00
Best time outside
Sun 07:00–10:00US AQI about 17
PM2.5 vs WHO guideline
0.6×8.6 µg/m³ over 24 h, guideline 15
Cigarette equivalent
≈ 0.4 a dayBerkeley Earth rule of thumb
European AQI
Goodlevel 1 of 6

Loading the live globe…

The live globe, centred on Perth. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Perth right now

PollutantNowNext 24 h vs WHOUS AQI band
Fine particles (PM2.5) 3.8 µg/m³ 0.6× Good
Coarse particles (PM10) 3.9 µg/m³ 0.2× Good
Nitrogen dioxide (NO2) 4.2 µg/m³ 0.3× Good
Ozone (O3) 34 µg/m³ 0.8× Good
Sulphur dioxide (SO2) 1.0 µg/m³ 0.1× Good
Carbon monoxide (CO) 115 µg/m³ 0.0× Good
Desert dust0 µg/m³
Smoke and haze (aerosol optical depth)0.09
UV index0.3

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM2.5, 45 for PM10, 25 for NO2, 40 for SO2 and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline.

Next 48 hours

Hourly US AQI. Highest 50 around Mon 12:00, lowest 16 around Sun 09:00.

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Perth

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 150.

DayUS AQIAt worstWorst hourPM2.5 avgUV max
Sun 27 Sept 16–35 Good 19:00 7.0 5.7
Mon 28 Sept 39–50 Good 12:00 6.7 6.0
Tue 29 Sept 37–55 Moderate 23:00 12 5.5
Wed 30 Sept 50–55 Moderate 0:00 9.0 7.0
Thu 1 Oct 50–54 Moderate 9:00 11 6.0

Common questions about the air in Perth

  1. Is the air in Perth safe today?

    Yes. Right now the US AQI in Perth is 17, which counts as good. Great air. A perfect time to be outside.

  2. When is the best time to be outside in Perth?

    Sun 07:00–10:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 17. The worst hour is around Mon 05:00, at 47.

  3. What is the main pollutant in Perth?

    Fine particles (PM2.5). It drives the index right now, at 3.8 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

  4. How does Perth's air compare with the WHO guideline?

    Within the guideline. Over the next 24 hours PM2.5 averages about 8.6 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. The other pollutants stay within their guideline levels.

  5. How many cigarettes is a day of Perth's air?

    About 0.4 cigarettes. Over the next 24 hours PM2.5 averages about 8.6 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

  6. Will air quality in Perth improve this week?

    Today looks cleanest. Its AQI peaks at 35, against 55 on Tuesday, the worst day in the forecast.

Measured near Perth

StationDistancePM2.5 µg/m³Measured
Unnamed sensor Sensor.Community, low-cost sensor 9.0 km 0.1 Sun 07:47

Air quality near Perth

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About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (10 km inside Europe), refreshed twice a day. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown; ground stations, where there are any nearby, show what monitors actually measure. The US AQI follows the US EPA scale and the European AQI the EEA bands. Readings for 31.95°S, 115.86°E, updated 2026-09-26 23:00 UTC.