Worst air pollution Lorient, today and tomorrow
Today (16 July): Air quality in Lorient is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 51.8/100).
Tomorrow (17 July 2026): Air quality in Lorient is medium. All pollutants stay as today. Pollution peaks around 4:00 PM (O3: 44.2/100). 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.
Lorient's air quality benefits from its exceptional Atlantic and Biscay Bay coastal position in Brittany, with consistent and powerful Atlantic westerlies providing reliable maritime ventilation. Vehicle traffic on the N165 and the French naval base operations contribute local sources, while the outstanding Atlantic coastal exposure and the Scorff-Blavet estuary's open geometry generally maintain Lorient among France's cleaner major coastal urban environments throughout most of the year.
Today - 16 July | Pollution peaks at 13:00
AQI:
Medium
51.8/100
PM2.5 (fine particles):
Good
12.0/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
17.0/100
O3 (ozone):
Medium
51.8/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
11.5/100
PM1 (ultrafine particles):
Good
14.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
44.2/100
PM2.5 (fine particles):
Good
6.6/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
6.9/100
O3 (ozone):
Medium
44.2/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Good
8.3/100
Pollen forecast in Lorient
View pollen forecastFrequently Asked Questions
Is air quality bad in Lorient right now?
On 16 July 2026, overall air quality in Lorient is medium. AQI is the main air quality indicator at 51.8/100. Pollution peaks around 1:00 PM (O3: 51.8/100).
Will air quality be worse tomorrow in Lorient?
On 17 July 2026, air quality conditions in Lorient will be similar to today, with AQI forecast at medium at 44.2/100. Pollution peaks around 4:00 PM (O3: 44.2/100).
When is air pollution at its worst in Lorient?
The days that hit sensitive groups hardest in Lorient are calm spring ones, when fishing-port and coastal traffic and the birch and oak pollen peak overlap; Atlantic sea breezes ventilate the coast reliably, so relief usually isn't far behind. The presence of Breton dairy pasture and coastal farmland in the area adds another layer to the local pattern.
Are air quality levels in Lorient 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 France?
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