Worst air pollution Semarang, today and tomorrow
Today (16 July): Air quality in Semarang is very poor. AQI and O3 are very poor; PM2.5, NO2, SO2, and PM1 are medium; PM10, CO, and HCHO are good. Pollution peaks around 1:00 PM (O3: 86.8/100).
Tomorrow (17 July 2026): Air quality in Semarang is very poor. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 100/100). 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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Semarang's air quality reflects Central Java's capital on the flat Java Sea coastal plain, with vehicle traffic on the Jalan Tol Semarang-Solo and the surrounding manufacturing, textile, and port operations contributing local sources. Java Sea breezes provide coastal ventilation, while the Diponegoro industrial corridor and the extraordinary two-stroke vehicle density maintain moderate to elevated readings and the city's low-lying coastal position with limited natural topographic dispersal creates concentration under calm conditions throughout the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Very poor
86.8/100
PM2.5 (fine particles):
Medium
40.0/100
PM10 (coarse particles):
Good
12.6/100
NO2 (nitrogen dioxide):
Medium
43.7/100
O3 (ozone):
Very poor
86.8/100
SO2 (sulfur dioxide):
Medium
53.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.8/100
PM1 (ultrafine particles):
Medium
41.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Medium
42.5/100
PM10 (coarse particles):
Good
14.8/100
NO2 (nitrogen dioxide):
Medium
40.9/100
O3 (ozone):
Very poor
100/100
SO2 (sulfur dioxide):
Medium
58.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.9/100
PM1 (ultrafine particles):
Medium
45.5/100
Pollen forecast in Semarang
View pollen forecastFrequently Asked Questions
Is air quality bad in Semarang right now?
On 16 July 2026, overall air quality in Semarang is very poor. AQI is the main air quality indicator at 86.8/100. Pollution peaks around 1:00 PM (O3: 86.8/100).
Will air quality be worse tomorrow in Semarang?
On 17 July 2026, air quality conditions in Semarang will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 1:00 PM (O3: 100/100).
When is air pollution at its worst in Semarang?
Reduced air quality in Semarang is most likely when vegetation introduced urban trees and coastal vegetation pollen peaks, alongside periods of vehicle traffic on the Jalan Tol Semarang-Solo and the surrounding manufacturing, textile, and port operations; a shift to wetter or windier weather typically brings noticeable relief.
Are air quality levels in Semarang 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