Worst air pollution Swanley, today and tomorrow
Today (9 August): Air quality in Swanley is fair. PM2.5, NO2, and PM1 are fair; AQI and O3 are medium; PM10, SO2, CO, and HCHO are good. Pollution peaks around 3:00 PM (O3: 56.2/100).
Tomorrow (10 August 2026): Air quality in Swanley is fair. AQI worsens to fair; PM2.5 decreases to good; NO2 decreases to good; O3 increases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 33.3/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Rush-hour queues near the A47 are usually when readings climb the most. Swanley's air quality reflects its position within Kent, with local traffic and the town's built-up core as the main contributors. Thanks to the area's changeable Atlantic weather, pollution rarely lingers for long, which keeps average readings fairly unremarkable by UK standards.
Today - 9 August | Pollution peaks at 15:00
AQI:
Medium
56.2/100
PM2.5 (fine particles):
Fair
20.0/100
PM10 (coarse particles):
Good
5.3/100
NO2 (nitrogen dioxide):
Fair
38.5/100
O3 (ozone):
Medium
56.2/100
SO2 (sulfur dioxide):
Good
7.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.8/100
PM1 (ultrafine particles):
Fair
25.8/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 17:00
AQI:
Fair
33.3/100
PM2.5 (fine particles):
Good
6.6/100
PM10 (coarse particles):
Good
2.4/100
NO2 (nitrogen dioxide):
Good
10.7/100
O3 (ozone):
Fair
33.3/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.6/100
PM1 (ultrafine particles):
Good
5.9/100
Pollen forecast in Swanley
View pollen forecastFrequently Asked Questions
Is air quality bad in Swanley right now?
On 9 August 2026, overall air quality in Swanley is fair. NO2 is the main pollutant at 38.5/100. Pollution peaks around 3:00 PM (O3: 56.2/100).
Will air quality be worse tomorrow in Swanley?
On 10 August 2026, air quality conditions in Swanley will be similar to today, with AQI forecast at fair at 33.3/100. Pollution peaks around 5:00 PM (O3: 33.3/100).
When is air pollution at its worst in Swanley?
There's a clear yearly cycle to air quality in Swanley if you look closely. Summer brings a different issue — stronger sunlight can push up ozone levels on hot, sunny days, even though traffic pollution itself often disperses more easily. Winter tends to be worst, with wood burning, home heating, and still, cold air trapping traffic fumes from the A47 closer to ground level.
Are air quality levels in Swanley 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.
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: 9 August 2026 at 20:27 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Get the full experience in the Airmine app.