Worst air pollution Beja, today and tomorrow

Today (9 August): Air quality in Beja is fair. AQI, PM2.5, NO2, O3, and PM1 are fair; PM10, SO2, CO, and HCHO are good. Pollution peaks around 2:00 PM (O3: 32.2/100).
Tomorrow (10 August 2026): Air quality in Beja is fair. PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 37.0/100). 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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Beja's setting on the Alentejo plain in southern Portugal means agricultural machinery and vehicle traffic across the wide plain drives most of the local variation in air quality across the year. The Beja terrain nearby can trap emissions under stable conditions, though stronger winds or rainfall usually bring noticeable improvement, and residents typically notice the clearest air during the more unsettled, windier stretches of the year.

Today - 9 August | Pollution peaks at 14:00

AQI:

Fair

32.2/100

PM2.5 (fine particles):

Fair

29.8/100

PM10 (coarse particles):

Good

11.7/100

NO2 (nitrogen dioxide):

Fair

22.0/100

O3 (ozone):

Fair

32.2/100

SO2 (sulfur dioxide):

Good

11.0/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

2.1/100

PM1 (ultrafine particles):

Fair

20.8/100

Levels show the poorest local air quality during the day

Tomorrow - 10 August | Pollution peaks at 13:00

AQI:

Fair

37.0/100

PM2.5 (fine particles):

Fair

25.7/100

PM10 (coarse particles):

Good

10.8/100

NO2 (nitrogen dioxide):

Fair

31.4/100

O3 (ozone):

Fair

37.0/100

SO2 (sulfur dioxide):

Good

14.0/100

CO (carbon monoxide):

Good

0.0/100

HCHO (formaldehyde):

Good

2.0/100

PM1 (ultrafine particles):

Good

18.0/100

Pollen forecast in Beja

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Frequently Asked Questions

Is air quality bad in Beja right now?

On 9 August 2026, overall air quality in Beja is fair. AQI is the main air quality indicator at 32.2/100. Pollution peaks around 2:00 PM (O3: 32.2/100).

Will air quality be worse tomorrow in Beja?

On 10 August 2026, air quality conditions in Beja will be similar to today, with AQI forecast at fair at 37.0/100. Pollution peaks around 1:00 PM (O3: 37.0/100).

When is air pollution at its worst in Beja?

The clearest dips in Beja's air quality track oak and plane pollen peaks and periods of agricultural machinery and vehicle traffic across the wide plain; the rest of the year typically brings clearer, more consistent conditions for the Beja area, particularly once autumn winds set in and the local terrain ventilates more easily than during calmer stretches.

Are air quality levels in Beja 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: 10 August 2026 at 02:34 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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