London Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (10 October): Air quality in London is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 PM (NO2: 22.5/100).
Air Quality Tomorrow
Tomorrow (11 October 2026): Air quality in London is moderate. AQI worsens to moderate; PM2.5 increases to moderate; PM10 increases to fair; NO2 increases to moderate; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 8:00 PM (NO2: 49.1/100).
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Air Quality
Today - 10 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 22.5/100 |
| PM2.5 (fine particles) | Good | 15.8/100 |
| PM10 (coarse particles) | Good | 12.0/100 |
| NO2 (nitrogen dioxide) | Fair | 22.5/100 |
| O3 (ozone) | Good | 15.0/100 |
| SO2 (sulfur dioxide) | Good | 1.6/100 |
| CO (carbon monoxide) | Good | 0.6/100 |
| HCHO (formaldehyde) | Good | 2.4/100 |
| PM1 (ultrafine particles) | Good | 5.2/100 |
Tomorrow - 11 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Moderate | 49.1/100 |
| PM2.5 (fine particles) | Moderate | 40.1/100 |
| PM10 (coarse particles) | Fair | 24.6/100 |
| NO2 (nitrogen dioxide) | Moderate | 49.1/100 |
| O3 (ozone) | Good | 13.6/100 |
| SO2 (sulfur dioxide) | Good | 7.0/100 |
| CO (carbon monoxide) | Good | 0.9/100 |
| HCHO (formaldehyde) | Good | 10.8/100 |
| PM1 (ultrafine particles) | Fair | 26.9/100 |
Local Environmental Conditions
Around the heart of London, a mix of built-up land and open space means traffic is an important, but not overwhelming, local pollution source. In cold weather, wood burning and other home heating become a noticeable source of fine particles. Trees nearby help filter some particles from the air, though in hot weather they also emit compounds that feed ozone formation.
Particle levels tend to be highest from November to March, when home heating and traffic add more emissions and cold, calm spells at around 4°C slow their dispersal. By contrast, ozone rises a little on sunny days from June to August, but the mild summers, around 18°C, keep it in check. Overall, breezy weather in December, with winds near 20 km/h, tends to sweep pollution away.
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Air quality forecast neighborhoods 31 neighborhoods
Popular Local Routes 12 routes
Local parkruns 148 parkruns
Local events 7 events
Frequently Asked Questions About Air Quality in London, City of
Is air quality bad in London right now?
On 10 October 2026, overall air quality in London is fair. AQI is the main air quality indicator at 22.5/100. Pollution peaks around 7:00 PM (NO2: 22.5/100).
Will air quality be worse tomorrow in London?
On 11 October 2026, air quality conditions in London will be worse than today, with AQI forecast at moderate at 49.1/100. Pollution peaks around 8:00 PM (NO2: 49.1/100).
When is air pollution at its worst in London?
Particle levels tend to be highest from November to March, when home heating and traffic add more emissions and cold, calm spells at around 4°C slow their dispersal. By contrast, ozone rises a little on sunny days from June to August, but the mild summers, around 18°C, keep it in check. Overall, breezy weather in December, with winds near 20 km/h, tends to sweep pollution away.
Are air quality levels in London 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |