Bandar Seri Begawan weather in September 2025

Expect 90°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Bandar Seri Begawan in September. Check more long-term weather averages for Bandar Seri Begawan in September before you book your next holiday to Brunei in 2025/2026.

  • 90°F maximum daytime temperature in September in Bandar Seri Begawan90
    90°F max day temperature
  • 6 hours of sunshine per day
  • 21 days with some rainfall in September in Bandar Seri Begawan21
    21 days with some rainfall
  • 73°F minimum night-time temperature in September in Bandar Seri Begawan73
    73°F min night temperature
  • 12 hours of daylight per day in September in Bandar Seri Begawan12
    12 hours of daylight per day
  • Very high heat & humidity in September in Bandar Seri BegawanVH
    Very High heat & humidity
  • 12.1 inches monthly rainfall in September in Bandar Seri Begawan12.1
    12.1 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Bandar Seri Begawan11
    11+ (Extreme) UV index
  • 86°F sea temperature in September in Bandar Seri Begawan86
    86°F sea temperature

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The September weather guide for Brunei (Bandar Seri Begawan) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Bandar Seri Begawan in September?

Daytime temperatures usually reach 90°F in Bandar Seri Begawan in September with very high heat and humidity, falling to 73°F at night.

How sunny is it in Bandar Seri Begawan in September?

There are normally 6 hours of bright sunshine each day in Bandar Seri Begawan in September - that's 53% of daylight hours.

How warm is the sea around Bandar Seri Begawan in September?

The average sea temperature around Bandar Seri Begawan in September is 86°F.

Does it rain in Bandar Seri Begawan in September?

There are usually 21 days with some rain in Bandar Seri Begawan in September and the average monthly rainfall is 12.1 inches.

Bandar Seri Begawan September sunrise & sunset times

Browse the sunrise and sunset times for Bandar Seri Begawan in September 2025. Select a month to view Bandar Seri Begawan sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:14 18:26
Monday, 15th September 2025 06:11 18:20
Tuesday, 30th September 2025 06:08 18:12

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