Worst air pollution São Sebastião, today and tomorrow
Today (16 July): Air quality in São Sebastião is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 15.5/100).
Tomorrow (17 July 2026): Air quality in São Sebastião is good. All pollutants stay as today. Pollution peaks around 8:00 PM (O3: 16.3/100). 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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São Sebastião's air quality benefits from its São Paulo state northern Atlantic coast position between Santos and Ubatuba, with consistent sea breezes providing reliable maritime ventilation along this scenic Litoral Norte resort and oil terminal coastline. Vehicle emissions from the SP-099 and the Petrobras oil terminal operations contribute local sources, while the Serra do Mar escarpment and the coastal position create dramatic topographic variation and the Atlantic generally maintains good conditions throughout most of the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Good
15.5/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
15.5/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
1.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 20:00
AQI:
Good
16.3/100
PM2.5 (fine particles):
Good
9.8/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
16.3/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
1.8/100
Pollen forecast in São Sebastião
View pollen forecastFrequently Asked Questions
Is air quality bad in São Sebastião right now?
On 16 July 2026, overall air quality in São Sebastião is good. AQI is the main air quality indicator at 15.5/100. Pollution peaks around 11:00 PM (O3: 15.5/100).
Will air quality be worse tomorrow in São Sebastião?
On 17 July 2026, air quality conditions in São Sebastião will be similar to today, with AQI forecast at good at 16.3/100. Pollution peaks around 8:00 PM (O3: 16.3/100).
When is air pollution at its worst in São Sebastião?
São Sebastião residents notice reduced air quality mainly when native Atlantic Forest trees and the dramatic escarpment vegetation pollen peaks, and during spells of vehicle emissions from the SP-099 and the Petrobras oil terminal operations; otherwise, the area's setting generally supports clear, well-ventilated conditions.
Are air quality levels in São Sebastião 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