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Weather in Castlereagh, United Kingdom 🇬🇧

Current Weather in Castlereagh

Small Craft warning for all coasts of Ireland
Patchy rain nearby
16°C
Feels like 12°C. Patchy rain nearby.
🌬️ 14 km/h WSW
💧 61% Humidity
🧭 1017 hPa
👁️ 10.0 km Visibility
☀️ UV Index: 1.8
🌡️ Dew Point: 8°C
🌅 Sunrise: 06:45 AM
🌇 Sunset: 07:56 PM
Map Overlays:

Right now Castlereagh is 16°C with patchy rain nearby, feeling like 12°C. Humidity sits at 61% and winds are near 14 km/h, and the UV index is 2 (low). Over the next few days, temperatures in Castlereagh range from about 7°C to 17°C. ⚠️ Small Craft warning for all coasts of Ireland

Hourly Forecast for Castlereagh

15:00
Patchy rain nearby
16°
16%
16:00
Overcast
14°
17%
17:00
Patchy rain nearby
14°
18%
18:00
Patchy rain nearby
14°
18%
19:00
Overcast
14°
17%
20:00
Overcast
13°
17%
21:00
Overcast
13°
17%
22:00
Overcast
12°
18%
23:00
Overcast
12°
18%
00:00
Overcast
12°
19%
01:00
Overcast
11°
24%
02:00
Overcast
11°
25%
03:00
Overcast
10°
26%
04:00
Overcast
10°
30%
05:00
Overcast
11°
25%
06:00
Overcast
11°
23%
07:00
Partly Cloudy
12°
11%
08:00
Overcast
12°
28%
09:00
Overcast
13°
23%
10:00
Overcast
14°
21%
11:00
Patchy rain nearby
15°
22%
12:00
Patchy rain nearby
14°
33%
13:00
Patchy rain nearby
14°
36%
14:00
Light rain shower
14°
56%

14-Day Forecast for Castlereagh

Wed, Sep 09
Patchy rain nearby Patchy rain nearby
16° /
Thu, Sep 10
Overcast Overcast
15° / 10°
Fri, Sep 11
Patchy rain nearby Patchy rain nearby
17° /
Sat, Sep 12
Overcast Overcast
17° /
Sun, Sep 13
Overcast Overcast
18° /
Mon, Sep 14
Sunny Sunny
20° / 13°
Tue, Sep 15
Patchy rain nearby Patchy rain nearby
18° / 11°
Wed, Sep 16
Patchy rain nearby Patchy rain nearby
15° /
Thu, Sep 17
Overcast Overcast
16° /
Fri, Sep 18
Overcast Overcast
17° /
Sat, Sep 19
Sunny Sunny
18° /
Sun, Sep 20
Sunny Sunny
19° /
Mon, Sep 21
Sunny Sunny
19° / 10°
Tue, Sep 22
Sunny Sunny
18° / 10°

Additional Forecasts for Castlereagh

Air Quality

💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 150.0 μg/m³
O₃ (Ozone) 67.0 μg/m³
NO₂ (Nitrogen Dioxide) 1.6 μg/m³
SO₂ (Sulphur Dioxide) 0.3 μg/m³
PM2.5 (Fine particles) 2.3 μg/m³
PM10 (Coarse particles) 5.8 μg/m³

Historical Weather

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Best Time to Be Outside in Castlereagh Today

The most comfortable window in Castlereagh today looks like 15:00 to 18:00, when it is around 15°C. It should stay dry through that window. No significant rain is expected in the next several hours.

Frequently Asked Questions about Weather in Castlereagh

What is the temperature in Castlereagh right now?

Castlereagh is sitting at 16°C (60°F) right now, patchy rain nearby (feels like 12°C).

What's the weather like in Castlereagh right now?

Right now Castlereagh has Patchy rain nearby, humidity 61%, wind 14 km/h WSW.

What is today's forecast for Castlereagh?

Today in Castlereagh: high 16°C, low 7°C, patchy rain nearby. Chance of rain: 31%.

What is the 7-day weather forecast for Castlereagh?

Daily highs and lows for Castlereagh:

  • 2026-09-09: 16°C / 7°C
  • 2026-09-10: 15°C / 10°C
  • 2026-09-11: 17°C / 9°C
  • 2026-09-12: 17°C / 9°C
  • 2026-09-13: 18°C / 9°C
  • 2026-09-14: 20°C / 13°C
  • 2026-09-15: 18°C / 11°C
Is it going to rain in Castlereagh today?

There is a 31% chance of rain in Castlereagh today. Total expected precipitation: 0.18 mm.

What is the wind speed in Castlereagh right now?

Wind in Castlereagh is currently 14 km/h (9 mph) from the WSW.

What is the UV index in Castlereagh right now?

The UV index in Castlereagh is currently 1.8 (low). Sun protection is recommended when the index is 3 or higher.

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