Worst air pollution Saint-Malo, today and tomorrow
Today (16 July): Air quality in Saint-Malo is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 49.1/100).
Tomorrow (17 July 2026): Air quality in Saint-Malo is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 3:00 PM (O3: 35.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Saint-Malo's air quality is driven largely by fishing-port and coastal traffic, close to the Odet, though Atlantic sea breezes ventilate the coast reliably, limiting how much pollution can build up locally. Steady Atlantic winds keep air quality good in almost every season, and even summer rarely sees the pollution build-up common further inland.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
49.1/100
PM2.5 (fine particles):
Good
8.8/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Good
10.7/100
O3 (ozone):
Medium
49.1/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
10.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
35.0/100
PM2.5 (fine particles):
Good
7.1/100
PM10 (coarse particles):
Good
2.5/100
NO2 (nitrogen dioxide):
Good
10.6/100
O3 (ozone):
Fair
35.0/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.2/100
PM1 (ultrafine particles):
Good
6.4/100
Pollen forecast in Saint-Malo
View pollen forecastFrequently Asked Questions
Is air quality bad in Saint-Malo right now?
On 16 July 2026, overall air quality in Saint-Malo is medium. AQI is the main air quality indicator at 49.1/100. Pollution peaks around 2:00 PM (O3: 49.1/100).
Will air quality be worse tomorrow in Saint-Malo?
On 17 July 2026, air quality conditions in Saint-Malo will be worse than today, with AQI forecast at fair at 35.0/100. Pollution peaks around 3:00 PM (O3: 35.0/100).
When is air pollution at its worst in Saint-Malo?
For people sensitive to both pollen and pollution in Saint-Malo, spring days combining fishing-port and coastal traffic with the birch and oak peak are the ones to watch; Atlantic sea breezes ventilate the coast reliably, which tends to clear things fairly quickly.
Are air quality levels in Saint-Malo 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