Worst air pollution La Seyne-sur-Mer, today and tomorrow
Today (16 July): Air quality in La Seyne-sur-Mer is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 43.3/100).
Tomorrow (17 July 2026): Air quality in La Seyne-sur-Mer is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 49.1/100). 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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La Seyne-sur-Mer's air quality reflects the Toulon metropolitan area's western bay position, with the DCNS naval shipbuilding and the surrounding industrial and port operations generating local industrial emissions alongside vehicle traffic on the A50. The Mediterranean sea breezes and the enclosed Toulon Bay geometry create complex ventilation patterns, while the Mistral wind periodically provides powerful air flushing and the naval shipbuilding operations represent the most distinctive local industrial air quality source.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
43.3/100
PM2.5 (fine particles):
Good
18.2/100
PM10 (coarse particles):
Good
12.8/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Medium
43.3/100
SO2 (sulfur dioxide):
Good
5.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
10.0/100
PM1 (ultrafine particles):
Good
12.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
49.1/100
PM2.5 (fine particles):
Fair
20.3/100
PM10 (coarse particles):
Good
13.5/100
NO2 (nitrogen dioxide):
Fair
25.9/100
O3 (ozone):
Medium
49.1/100
SO2 (sulfur dioxide):
Good
4.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.7/100
PM1 (ultrafine particles):
Good
13.9/100
Pollen forecast in La Seyne-sur-Mer
View pollen forecastFrequently Asked Questions
Is air quality bad in La Seyne-sur-Mer right now?
On 16 July 2026, overall air quality in La Seyne-sur-Mer is fair. NO2 is the main pollutant at 21.6/100. Pollution peaks around 3:00 PM (O3: 43.3/100).
Will air quality be worse tomorrow in La Seyne-sur-Mer?
On 17 July 2026, air quality conditions in La Seyne-sur-Mer will be similar to today, with NO2 forecast at fair at 25.9/100. Pollution peaks around 4:00 PM (O3: 49.1/100).
When is air pollution at its worst in La Seyne-sur-Mer?
In La Seyne-sur-Mer, the combination of tourist traffic and coastal industry and heavy plane and pine pollen in spring is what most affects sensitive groups; the Mistral wind provides powerful periodic ventilation, so poor conditions rarely last more than a couple of days.
Are air quality levels in La Seyne-sur-Mer 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