Worst air pollution Freetown, today and tomorrow
Today (16 July): Air quality in Freetown is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 17.1/100).
Tomorrow (17 July 2026): Air quality in Freetown is good. All pollutants stay as today. Pollution peaks around 1:00 PM (O3: 17.8/100). 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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Freetown's air quality reflects the exceptional Sierra Leone Atlantic coastal position on the Sierra Leone Peninsula, with consistent Atlantic trade winds and Gulf of Guinea breezes providing reliable maritime ventilation. Vehicle traffic on surrounding roads and the port, vehicle density, and informal industrial corridor generate elevated PM2.5, while dry season Harmattan dust contributes PM10 and Freetown generally maintains moderate West African Atlantic coastal capital readings throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Good
17.1/100
PM2.5 (fine particles):
Good
5.3/100
PM10 (coarse particles):
Good
1.6/100
NO2 (nitrogen dioxide):
Good
8.1/100
O3 (ozone):
Good
17.1/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
8.0/100
PM1 (ultrafine particles):
Good
6.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 13:00
AQI:
Good
17.8/100
PM2.5 (fine particles):
Good
7.7/100
PM10 (coarse particles):
Good
2.3/100
NO2 (nitrogen dioxide):
Good
9.0/100
O3 (ozone):
Good
17.8/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.8/100
PM1 (ultrafine particles):
Good
9.9/100
Frequently Asked Questions
Is air quality bad in Freetown right now?
On 16 July 2026, overall air quality in Freetown is good. AQI is the main air quality indicator at 17.1/100. Pollution peaks around 1:00 PM (O3: 17.1/100).
Will air quality be worse tomorrow in Freetown?
On 17 July 2026, air quality conditions in Freetown will be similar to today, with AQI forecast at good at 17.8/100. Pollution peaks around 1:00 PM (O3: 17.8/100).
When is air pollution at its worst in Freetown?
The biggest local contributor to pollution in Freetown is traffic emissions, particularly once dry spells bring strong winds. Dust carried on these winds adds substantially to particulate levels. Sea breezes typically keep conditions in check, except during still weather.
Are air quality levels in Freetown 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