What is the air quality in Castlereagh today?

The current Air Quality Index (AQI) in Castlereagh is 37 (Good). PM2.5 concentration is 8.83 µg/m³.

What is the temperature in Castlereagh right now?

The current temperature in Castlereagh is 9.2°C (feels like 6.9°C). Humidity is 90.6% and wind speed is 15.6 km/h.

Is it safe to go outside in Castlereagh?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Castlereagh, United Kingdom

Overcast

9.2°C · 90.6% humidity

9.2°

Feels 6.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

25 11pm

37 2am

29 5am

27 8am

26 11am

25 2pm

25 5pm

25 8pm

Air Quality Index Trend

46h · 4 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.

90.6%

Humidity

15.6 km/h

Wind NW

1016.4 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.83 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Castlereagh?

Temperature & Precipitation

PM2.5 Trend

46h · 4 stations

PM2.58.83 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (3 stations within 25 km)

8.83

Median

9.57

Average

7.0

Low

12.6

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -2.8

What is the 7-day forecast for Castlereagh?

07-22

15.8° 9.2°

0.13 mm

07-23

15.0° 7.3°

2.13 mm

07-24

14.8° 12.0°

6.94 mm

07-25

16.0° 8.3°

1.94 mm

07-26

17.6° 10.7°

5.44 mm

07-27

18.7° 8.7°

0.31 mm

07-28

18.4° 7.9°

1.94 mm

Both models agree Avg diff: 3.1°C

Where are air quality stations near Castlereagh?

Belfast Centre, United Kingdom

4.1 km PM2.5: 2.4 µg/m³

Belfast Centre, United Kingdom

4.1 km PM2.5: 11.5 µg/m³

Belfast Stockman's Lane, United Kingdom

5.8 km PM2.5: 22.6 µg/m³

Belfast Stockman's Lane, United Kingdom

5.8 km PM2.5: 12.6 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 3.6 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 6.5 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 9.8 µg/m³

North Down Holywood A2, United Kingdom

8.2 km PM2.5: 6.0 µg/m³

Lisburn Dunmurry Seymour Hill, United Kingdom

8.7 km PM2.5: 8.6 µg/m³

Lisburn Dunmurry Seymour Hill, United Kingdom

8.7 km PM2.5: 7.4 µg/m³

What cities are near Castlereagh?

35 Belfast 38 Newtownabbey 48 Lisburn 38 Newtownards 38 Carrickfergus 36 Bangor 35 Antrim 38 Larne 33 Craigavon 31 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 2026-07-22T01:08 UTC.