Kailua, Big Island weather in October 2025

Expect 22°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Kailua, Big Island in October. Check more long-term weather averages for Kailua, Big Island in October before you book your next holiday to Hawaii in 2025/2026.

  • 22°C maximum daytime temperature in October in Kailua, Big Island22
    22°C max day temperature
  • 16 days with some rainfall in October in Kailua, Big Island16
    16 days with some rainfall
  • 14°C minimum night-time temperature in October in Kailua, Big Island14
    14°C min night temperature
  • 12 hours of daylight per day in October in Kailua, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in October in Kailua, Big IslandM
    Moderate heat & humidity
  • 46 mm monthly rainfall in October in Kailua, Big Island46
    46 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in October in Kailua, Big Island10
    10 (Very High) UV index
  • 27°C sea temperature in October in Kailua, Big Island27
    27°C sea temperature

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The October weather guide for Hawaii (Kailua, Big 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Kailua, Big Island in October?

Daytime temperatures usually reach 22°C in Kailua, Big Island in October, falling to 14°C at night.

How warm is the sea around Kailua, Big Island in October?

The average sea temperature around Kailua, Big Island in October is 27°C.

Does it rain in Kailua, Big Island in October?

There are usually 16 days with some rain in Kailua, Big Island in October and the average monthly rainfall is 46mm.

Kailua, Big Island October sunrise & sunset times

Browse the sunrise and sunset times for Kailua, Big Island in October 2025. Select a month to view Kailua, Big Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:15 18:12
Thursday, 16th October 2025 06:19 17:59
Friday, 31st October 2025 06:25 17:50

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