Worst air pollution Piraeus, today and tomorrow
Today (9 August): Air quality in Piraeus is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 39.1/100).
Tomorrow (10 August 2026): Air quality in Piraeus is fair. NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 37.2/100). Airmine updates local air quality forecasts four times daily.
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Piraeus' air quality faces significant challenges from the Eastern Mediterranean's largest port, with cruise ship, container vessel, and ferry emissions from the busy harbour generating elevated SO₂ and PM2.5 alongside heavy traffic on the E94 Athens-Piraeus coastal highway. The Saronic Gulf sea breezes provide afternoon ventilation, but the combined port and traffic emissions make Piraeus one of the most polluted locations in the broader Athens metropolitan area.
Today - 9 August | Pollution peaks at 13:00
AQI:
Fair
39.1/100
PM2.5 (fine particles):
Good
9.8/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Fair
21.6/100
O3 (ozone):
Fair
39.1/100
SO2 (sulfur dioxide):
Good
4.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
12.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Fair
37.2/100
PM2.5 (fine particles):
Good
9.3/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Good
12.5/100
O3 (ozone):
Fair
37.2/100
SO2 (sulfur dioxide):
Good
4.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
11.1/100
Pollen forecast in Piraeus
View pollen forecastSports venues in Piraeus
Frequently Asked Questions
Is air quality bad in Piraeus right now?
On 9 August 2026, overall air quality in Piraeus is fair. AQI is the main air quality indicator at 39.1/100. Pollution peaks around 1:00 PM (O3: 39.1/100).
Will air quality be worse tomorrow in Piraeus?
On 10 August 2026, air quality conditions in Piraeus will be similar to today, with AQI forecast at fair at 37.2/100. Pollution peaks around 1:00 PM (O3: 37.2/100).
When is air pollution at its worst in Piraeus?
Piraeus residents notice reduced air quality mainly when urban coastal setting pine and introduced trees pollen peaks, and during spells of cruise ship, container vessel, and ferry emissions from the busy harbour; the picture usually improves again once the season turns.
Are air quality levels in Piraeus 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.
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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.
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