Worst air pollution Calais, today and tomorrow
Today (20 September): Air quality in Calais is fair. AQI, PM2.5, and PM1 are fair; PM10, NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (PM2.5: 24.7/100).
Tomorrow (21 September 2026): Air quality in Calais is fair. PM10 increases to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 7:00 AM (PM2.5: 39.2/100). 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.
Calais' air quality reflects its exceptional English Channel position at the narrowest point of the Strait of Dover, with the port's intensive ferry and freight vehicle operations generating concentrated NOₓ from one of Europe's busiest short sea crossings. The Channel's powerful westerly and northeasterly winds provide strong natural ventilation, while the A16 motorway freight approach and cross-Channel freight intensity make Calais one of France's most distinctively port and freight-dominated urban environments.
Today - 20 September | Pollution peaks at 23:00
AQI:
Fair
24.7/100
PM2.5 (fine particles):
Fair
24.7/100
PM10 (coarse particles):
Good
18.8/100
NO2 (nitrogen dioxide):
Good
16.6/100
O3 (ozone):
Good
16.1/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.8/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Fair
21.1/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 07:00
AQI:
Fair
39.2/100
PM2.5 (fine particles):
Fair
39.2/100
PM10 (coarse particles):
Fair
26.9/100
NO2 (nitrogen dioxide):
Fair
29.2/100
O3 (ozone):
Good
15.9/100
SO2 (sulfur dioxide):
Good
4.0/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Fair
38.4/100
Pollen forecast in Calais
View pollen forecastFrequently Asked Questions
Is air quality bad in Calais right now?
On 20 September 2026, overall air quality in Calais is fair. AQI is the main air quality indicator at 24.7/100. Pollution peaks around 11:00 PM (PM2.5: 24.7/100).
Will air quality be worse tomorrow in Calais?
On 21 September 2026, air quality conditions in Calais will be similar to today, with AQI forecast at fair at 39.2/100. Pollution peaks around 7:00 AM (PM2.5: 39.2/100).
When is air pollution at its worst in Calais?
For people sensitive to both pollen and pollution in Calais, spring days combining former coalfield industry and motorway traffic with the birch and oak peak are the ones to watch; North Sea winds sweep across the open plains, which tends to clear things fairly quickly.
Are air quality levels in Calais 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 France?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
Get the full experience in the Airmine app.