Hawaii weather in August 2025

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

  • 30°C maximum daytime temperature in August in Hawaii (Honolulu, Oahu)30
    30°C max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in August in Hawaii (Honolulu, Oahu)7
    7 days with some rainfall
  • 22°C minimum night-time temperature in August in Hawaii (Honolulu, Oahu)22
    22°C min night temperature
  • 13 hours of daylight per day in August in Hawaii (Honolulu, Oahu)13
    13 hours of daylight per day
  • High heat & humidity in August in Hawaii (Honolulu, Oahu)H
    High heat & humidity
  • 14 mm monthly rainfall in August in Hawaii (Honolulu, Oahu)14
    14 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Hawaii (Honolulu, Oahu)11
    11+ (Extreme) UV index
  • 27°C sea temperature in August in Hawaii (Honolulu, Oahu)27
    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.

Top Hawaii destinations

Below are average maximum temperatures at popular countries, regions and places in Hawaii in August. Select a holiday destination to see more weather parameters.

All Hawaii destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Hawaii in August?

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

How sunny is it in Hawaii in August?

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

How warm is the sea around Hawaii in August?

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

Does it rain in Hawaii in August?

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

What is the chance of a hurricane in Hawaii in August?

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

Hawaii August sunrise & sunset times

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

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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