Hanalei, Kauai weather in August 2026

Expect daytime maximum temperatures of 84°F in Hanalei, Kauai, Hawaii in August and high heat and humidity based on long-term weather averages. There are 9 hours of sunshine per day on average with 17 days with some rainfall and typically 5.7 inches of rainfall in the month.

  • 84°F maximum daytime temperature in August in Hanalei, Kauai84
    84°F max day temperature
  • 9 hours of sunshine per day
  • 17 days with some rainfall in August in Hanalei, Kauai17
    17 days with some rainfall
  • 73°F minimum night-time temperature in August in Hanalei, Kauai73
    73°F min night temperature
  • 13 hours of daylight per day in August in Hanalei, Kauai13
    13 hours of daylight per day
  • High heat & humidity in August in Hanalei, KauaiH
    High heat & humidity
  • 5.7 inches monthly rainfall in August in Hanalei, Kauai5.7
    5.7 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Hanalei, Kauai11
    11+ (Extreme) UV index
  • 79°F sea temperature in August in Hanalei, Kauai79
    79°F sea temperature

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Hanalei, Kauai by month

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The August weather guide for Hawaii (Hanalei, Kauai) 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 Hanalei, Kauai in August?

Daytime temperatures usually reach 86°F in Hanalei, Kauai in August with high heat and humidity, falling to 72°F at night.

How sunny is it in Hanalei, Kauai in August?

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

How warm is the sea around Hanalei, Kauai in August?

The average sea temperature around Hanalei, Kauai in August is 81°F.

Does it rain in Hanalei, Kauai in August?

There are usually 7 days with some rain in Hanalei, Kauai in August and the average monthly rainfall is 0.6 inches.

What is the chance of a hurricane in Hanalei, Kauai in August?

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

Hanalei, Kauai August sunrise & sunset times

Browse the sunrise and sunset times for Hanalei, Kauai in August 2026. Select a month to view Hanalei, Kauai sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st August 2026 06:10 19:18
Sunday, 16th August 2026 06:16 19:08
Monday, 31st August 2026 06:21 18:55

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