What is the air quality in South Portland today?

The current Air Quality Index (AQI) in South Portland is 25 (Good). PM2.5 concentration is 6.0 µg/m³.

What is the temperature in South Portland right now?

The current temperature in South Portland is 6.5°C (feels like 2.7°C). Humidity is 60.8% and wind speed is 22.8 km/h.

Is it safe to go outside in South Portland?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in South Portland, United States

Partly Cloudy

6.5°C · 60.8% humidity

6.5°

Feels 2.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Model forecast

Nearby Monitoring Stations

AQI Forecast

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View AQI history for South Portland →

South Portland's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

60.8%

Humidity

22.8 km/h

Wind S

1029.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.0 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for South Portland?

Temperature & Precipitation

PM2.56.0 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for South Portland?

10-21

18.6° 4.1°

0.06 mm

10-22

14.5° 5.2°

2.87 mm

10-23

13.8° 6.3°

1.25 mm

10-24

12.3° 8.6°

10-25

18.5° 8.2°

23.69 mm

10-26

9.8° 3.9°

8.12 mm

10-27

9.7° 3.8°

2.31 mm

Both models agree Avg diff: 3.6°C

What cities are near South Portland?

25 Portland 27 South Portland Gardens 27 Westbrook 27 West Scarborough 29 Saco 27 Biddeford 13 Lewiston 28 Laconia 22 Amesbury 21 Newburyport

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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T01:24 UTC.