Air Quality in Sintra, Portugal

Windy
17.0°C · 75.5% humidity
17.0°
Feels 17.0°
6
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
22 11am
12
4
6 2pm
7
15
16 5pm
17
17
37 8pm
38
38
18 11pm
18
18
18 2am
18
18
18 5am
18
18
18 8am
18
18
Station readings
22
12
4
3
CAMS model adj -16
27
27
27
27
27
34
34
34
34
54
54
54
34
34
34
34
34
34
34
34
34
34
34
34
AD 728×90

Air Quality Index Trend

47h · 2 stn

Sintra's air quality is shaped by traffic emissions and residential heating. Pollution levels tend to peak during winter months when cold air traps emissions close to ground level.

75.5%
Humidity
142.2 km/h
Wind NNW
1014.8 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
6
1.54 µg/m³
PM10▲
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Sintra?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.51.54 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (4 stations within 25 km)
1.54
Median
4.98
Average
1.5
Low
7.2
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +4.7

What is the 7-day forecast for Sintra?

06-09
17.8° 15.8°
06-10
17.1° 16.3°
0.06 mm
06-11
22.3° 17.9°
06-12
21.2° 17.3°
06-13
19.2° 16.9°
06-14
18.1° 16.7°
0.38 mm
06-15
19.1° 17.2°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Sintra?

3
QSintra_Sensor1
0.9 km 24.0°C 48.0% RH PM2.5: 0.7 µg/m³ PM10: 1.1 µg/m³
34
Mem Martins, Sintra, Portugal
3.2 km PM2.5: 8.2 µg/m³
28
Mem Martins, Sintra, Portugal
3.2 km PM2.5: 6.7 µg/m³
14
Aldeia de Juzo
10.0 km 23.3°C 44.0% RH PM2.5: 3.4 µg/m³ PM10: 4.8 µg/m³
31
Entrecampos, Lisboa, Portugal
20.7 km PM2.5: 7.4 µg/m³
46
Olivais, Lisboa, Portugal
23.7 km PM2.5: 11.0 µg/m³
36
Olivais, Lisboa, Portugal
23.7 km PM2.5: 8.6 µg/m³
34
Laranjeiro, Almada, Portugal
24.5 km PM2.5: 8.2 µg/m³
32
Laranjeiro, Almada, Portugal
24.5 km PM2.5: 7.7 µg/m³

What cities are near Sintra?

8 Algueirão 12 Rio de Mouro 15 Cacém 15 Alcabideche 19 Massamá 20 Belas 15 Estoril 15 Monte Estoril 16 São Domingos de Rana 23 Olival
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T13:29 UTC.