Worst air pollution Caldas da Rainha, today and tomorrow
Today (30 August): Air quality in Caldas da Rainha is moderate. AQI and O3 are moderate; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 41.6/100).
Tomorrow (31 August 2026): Air quality in Caldas da Rainha is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 32.3/100). 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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Caldas da Rainha's air quality benefits from the Estremadura Atlantic coastal proximity in central Portugal, with consistent Atlantic westerlies providing reliable maritime ventilation. Vehicle traffic on the A8 motorway and surrounding ceramic, agriculture, and thermal spa operations contribute the primary local sources, while the Atlantic coastal proximity and the surrounding Torres Vedras-Óbidos hills generally maintain Caldas da Rainha among Portugal's more moderate central corridor urban environments throughout the year.
Today - 30 August | Pollution peaks at 14:00
AQI:
Moderate
41.6/100
PM2.5 (fine particles):
Good
11.2/100
PM10 (coarse particles):
Good
10.4/100
NO2 (nitrogen dioxide):
Good
18.4/100
O3 (ozone):
Moderate
41.6/100
SO2 (sulfur dioxide):
Good
3.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
6.9/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 16:00
AQI:
Fair
32.3/100
PM2.5 (fine particles):
Good
13.7/100
PM10 (coarse particles):
Good
11.0/100
NO2 (nitrogen dioxide):
Good
12.5/100
O3 (ozone):
Fair
32.3/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.0/100
PM1 (ultrafine particles):
Good
5.9/100
Pollen forecast in Caldas da Rainha
View pollen forecastFrequently Asked Questions
Is air quality bad in Caldas da Rainha right now?
On 30 August 2026, overall air quality in Caldas da Rainha is moderate. AQI is the main air quality indicator at 41.6/100. Pollution peaks around 2:00 PM (O3: 41.6/100).
Will air quality be worse tomorrow in Caldas da Rainha?
On 31 August 2026, air quality conditions in Caldas da Rainha will be better than today, with AQI forecast at fair at 32.3/100. Pollution peaks around 4:00 PM (O3: 32.3/100).
When is air pollution at its worst in Caldas da Rainha?
Residents in Caldas da Rainha are quickest to notice reduced air quality when pine and eucalyptus pollen peaks, or due to vehicle traffic on the A8 motorway and surrounding ceramic, agriculture, and thermal spa operations; for the rest of the year, natural airflow keeps background levels low.
Are air quality levels in Caldas da Rainha 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: 30 August 2026 at 20:26 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.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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