Honolulu, Oahu weather in August 2025

Expect 86°F 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.

• 86
  86°F max day temperature
• 9
  9 hours of sunshine per day
• 7
  7 days with some rainfall
• 72
  72°F min night temperature
• 13
  13 hours of daylight per day
• H
  High heat & humidity
• 0.6
  0.6 inches of monthly rainfall
• 11
  11+ (Extreme) UV index
• 81
  81°F 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)  |  Imperial (°F)

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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.

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