Honolulu, Oahu weather in August 2025

Expect 30°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Honolulu, Oahu in August. Check more long-term weather averages for Honolulu, Oahu in August before you book your next holiday to Hawaii in 2025/2026.

  • 30°C maximum daytime temperature in August in Honolulu, Oahu30
    30°C max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in August in Honolulu, Oahu7
    7 days with some rainfall
  • 22°C minimum night-time temperature in August in Honolulu, Oahu22
    22°C min night temperature
  • 13 hours of daylight per day in August in Honolulu, Oahu13
    13 hours of daylight per day
  • High heat & humidity in August in Honolulu, OahuH
    High heat & humidity
  • 14 mm monthly rainfall in August in Honolulu, Oahu14
    14 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Honolulu, Oahu11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Honolulu, Oahu27
    27°C sea temperature

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The August weather guide for Hawaii (Honolulu, Oahu) 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 Honolulu, Oahu in August?

Daytime temperatures usually reach 30°C in Honolulu, Oahu in August with high heat and humidity, falling to 22°C at night.

How sunny is it in Honolulu, Oahu in August?

There are normally 9 hours of bright sunshine each day in Honolulu, Oahu in August - that's 73% of daylight hours.

How warm is the sea around Honolulu, Oahu in August?

The average sea temperature around Honolulu, Oahu in August is 27°C.

Does it rain in Honolulu, Oahu in August?

There are usually 7 days with some rain in Honolulu, Oahu in August and the average monthly rainfall is 14mm.

What is the chance of a hurricane in Honolulu, Oahu in August?

On average less than 1 day in August in Honolulu, Oahu is likely to be affected by the passage of one or more tropical storms.

Honolulu, Oahu August sunrise & sunset times

Browse the sunrise and sunset times for Honolulu, Oahu in August 2025. Select a month to view Honolulu, Oahu sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:05 19:10
Saturday, 16th August 2025 06:10 19:00
Sunday, 31st August 2025 06:15 18:48

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