What is the air quality in Castlereagh today?

The current Air Quality Index (AQI) in Castlereagh is 28 (Good). PM2.5 concentration is 6.76 µg/m³.

What is the temperature in Castlereagh right now?

The current temperature in Castlereagh is 9.0°C (feels like 3.4°C). Humidity is 74.6% and wind speed is 66.2 km/h.

Is it safe to go outside in Castlereagh?

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

Air Quality in Castlereagh, United Kingdom

Windy

9.0°C · 74.6% humidity

9.0°

Feels 3.4°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

41h · 1 stn

View full history →

Castlereagh'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.

74.6%

Humidity

66.2 km/h

Wind SW

1017.2 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.76 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Castlereagh?

Temperature & Precipitation

PM2.5 Trend

41h · 1 station

PM2.56.76 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (4 stations within 25 km)

6.76

Median

4.85

Average

0.1

Low

7.7

High

PM2.5 µg/m³ · Model: 5.8 · Bias: -1.0

What is the 7-day forecast for Castlereagh?

10-21

9.0° 6.8°

0.75 mm

10-22

16.4° 5.3°

5.12 mm

10-23

8.5° 6.8°

2.62 mm

10-24

13.5° 5.0°

0.06 mm

10-25

9.0° 5.0°

7.19 mm

10-26

7.8° 5.2°

2.5 mm

10-27

10.9° 4.0°

1.56 mm

Both models agree Avg diff: 3.7°C

Where are air quality stations near Castlereagh?

Belfast Centre, United Kingdom

4.1 km PM2.5: 5.8 µg/m³

Belfast Centre, United Kingdom

4.1 km PM2.5: 7.4 µg/m³

Belfast Stockman's Lane, United Kingdom

5.8 km PM2.5: 6.0 µg/m³

Belfast Stockman's Lane, United Kingdom

5.8 km PM2.5: 5.5 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 5.8 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 9.1 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 5.8 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 5.8 µg/m³

Lisburn Dunmurry Seymour Hill, United Kingdom

8.7 km PM2.5: 5.0 µg/m³

Lisburn Dunmurry Seymour Hill, United Kingdom

8.7 km PM2.5: 5.8 µg/m³

What cities are near Castlereagh?

32 Belfast 25 Newtownabbey 29 Lisburn 9 Newtownards 21 Carrickfergus 4 Bangor 27 Antrim 24 Larne 24 Craigavon 17 Banbridge

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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 2026-10-21T15:00 UTC.