Worst air pollution Belfast, today and tomorrow
Today (16 July): Air quality in Belfast is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (O3: 28.5/100).
Tomorrow (17 July 2026): Air quality in Belfast is fair. All pollutants stay as today. Pollution peaks around 4:00 AM (O3: 28.5/100). 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
Use our Strava plugin to check your own exposure.
Like much of Belfast, Belfast's air quality is shaped less by industry these days and more by everyday road traffic. Residential heating and light industry add a modest seasonal contribution, though the region's typical south-westerlies keep overall levels moderate. The A6 sees the heaviest traffic, and that shows up clearly in local roadside monitoring.
Today - 16 July | Pollution peaks at 00:00
AQI:
Fair
28.5/100
PM2.5 (fine particles):
Good
16.2/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
1.0/100
O3 (ozone):
Fair
28.5/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
12.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 04:00
AQI:
Fair
28.5/100
PM2.5 (fine particles):
Good
18.0/100
PM10 (coarse particles):
Good
6.7/100
NO2 (nitrogen dioxide):
Good
1.2/100
O3 (ozone):
Fair
28.5/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
13.6/100
Pollen forecast in Belfast
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Belfast
Frequently Asked Questions
Is air quality bad in Belfast right now?
On 16 July 2026, overall air quality in Belfast is fair. AQI is the main air quality indicator at 28.5/100. Pollution peaks around 12:00 AM (O3: 28.5/100).
Will air quality be worse tomorrow in Belfast?
On 17 July 2026, air quality conditions in Belfast will be similar to today, with AQI forecast at fair at 28.5/100. Pollution peaks around 4:00 AM (O3: 28.5/100).
When is air pollution at its worst in Belfast?
Here's the thing about Belfast: air quality has a clear seasonal rhythm. In summer, ozone can build up on sunny afternoons, though windier, warmer weather usually helps clear traffic-related pollution faster than in winter. Come winter, NO₂ and PM2.5 usually creep up, as heating and calmer air let main road traffic emissions linger rather than disperse. Most of spring and autumn stays fairly steady, right in the middle of those two extremes.
Are air quality levels in Belfast 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.
Want to see air quality forecasts for other cities in United Kingdom?
Check air quality in other popular cities:
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