West Island weather in September 2025

Expect 82°F daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in West Island in September. Check more long-term weather averages for West Island in September before you book your next holiday to Cocos (Keeling) Islands in 2025/2026.

  • 82°F maximum daytime temperature in September in West Island82
    82°F max day temperature
  • 14 days with some rainfall in September in West Island14
    14 days with some rainfall
  • 73°F minimum night-time temperature in September in West Island73
    73°F min night temperature
  • 12 hours of daylight per day in September in West Island12
    12 hours of daylight per day
  • Moderate heat & humidity in September in West IslandM
    Moderate heat & humidity
  • 4.1 inches monthly rainfall in September in West Island4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in West Island11
    11+ (Extreme) UV index
  • 79°F sea temperature in September in West Island79
    79°F sea temperature

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The September weather guide for Cocos (Keeling) Islands, represented by West Island, (West Island) 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 West Island in September?

Daytime temperatures usually reach 82°F in West Island in September with moderate heat and humidity, falling to 73°F at night.

How warm is the sea around West Island in September?

The average sea temperature around West Island in September is 79°F.

Does it rain in West Island in September?

There are usually 14 days with some rain in West Island in September and the average monthly rainfall is 4.1 inches.

West Island September sunrise & sunset times

Browse the sunrise and sunset times for West Island in September 2025. Select a month to view West Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:06 17:59
Monday, 15th September 2025 05:57 17:59
Tuesday, 30th September 2025 05:47 17:59

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