Worst air pollution Secret Harbour, today and tomorrow
Today (16 July): Air quality in Secret Harbour is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (O3: 15.6/100).
Tomorrow (17 July 2026): Air quality in Secret Harbour is good. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 17.2/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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South of Perth along the coast, Secret Harbour is a newer residential suburb that benefits from the same steady sea breezes that ventilate much of the metropolitan coastline, keeping its air quality generally very good. Low humidity and dry summers reflect the region's Mediterranean climate, with little industrial activity given the largely residential character of the area. The main seasonal risk comes each summer, December through March, when bushfire smoke from bushland further inland or south can occasionally reduce air quality for short periods. Outside fire season, onshore winds off the Indian Ocean keep the suburb's air reliably clean.
Today - 16 July | Pollution peaks at 21:00
AQI:
Good
15.6/100
PM2.5 (fine particles):
Good
4.1/100
PM10 (coarse particles):
Good
1.7/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Good
15.6/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.5/100
PM1 (ultrafine particles):
Good
2.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 09:00
AQI:
Good
17.2/100
PM2.5 (fine particles):
Good
5.9/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Good
17.2/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
2.1/100
Pollen forecast in Secret Harbour
View pollen forecastSports venues in Secret Harbour
Frequently Asked Questions
Is air quality bad in Secret Harbour right now?
On 16 July 2026, overall air quality in Secret Harbour is good. AQI is the main air quality indicator at 15.6/100. Pollution peaks around 9:00 PM (O3: 15.6/100).
Will air quality be worse tomorrow in Secret Harbour?
On 17 July 2026, air quality conditions in Secret Harbour will be similar to today, with AQI forecast at good at 17.2/100. Pollution peaks around 9:00 AM (O3: 17.2/100).
When is air pollution at its worst in Secret Harbour?
In Secret Harbour, air quality typically takes its biggest hit during the peak fire danger period of December to March, the main exception to a clean record. For the rest of the year, dependable sea breezes keep pollutants from building up. Sensitive groups should watch forecasts during that period rather than assume year-round conditions apply.
Are air quality levels in Secret Harbour 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.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app