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Hanalei, Kauai weather in August 2026
Expect daytime maximum temperatures of 29°C 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 145 mm of rainfall in the month.
- 29°C max day temperature
29 - 9 hours of sunshine per day
- 17 days with some rainfall
17 - 23°C min night temperature
23 - 13 hours of daylight per day
13 - High heat & humidity
H - 145 mm of monthly rainfall
145 - 11+ (Extreme) UV index
11 - 26°C sea temperature
26
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Recommended for Hawaii
Expires at 23:59 on Wednesday 10th Dec 2025
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 / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Hanalei, Kauai in August?
Daytime temperatures usually reach 30°C in Hanalei, Kauai in August with high heat and humidity, falling to 22°C 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 27°C.
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 14mm.
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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