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Kailua, Oahu weather in August 2026
Expect daytime maximum temperatures of 31°C in Kailua, Oahu, Hawaii in August and high heat and humidity based on long-term weather averages. There are 10 hours of sunshine per day on average.
- 31°C max day temperature
31 - 10 hours of sunshine per day
- 7 days with some rainfall
7 - 22°C min night temperature
22 - 13 hours of daylight per day
13 - High heat & humidity
H - 38 mm of monthly rainfall
38 - 11+ (Extreme) UV index
11 - 26°C sea temperature
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The August weather guide for Hawaii (Kailua, 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)
More about the USA
How hot is it in Kailua, Oahu in August?
Daytime temperatures usually reach 31°C in Kailua, Oahu in August with high heat and humidity, falling to 22°C at night.
How sunny is it in Kailua, Oahu in August?
There are normally 10 hours of bright sunshine each day in Kailua, Oahu in August - that's 74% of daylight hours.
How warm is the sea around Kailua, Oahu in August?
The average sea temperature around Kailua, Oahu in August is 26°C.
Does it rain in Kailua, Oahu in August?
There are usually 7 days with some rain in Kailua, Oahu in August and the average monthly rainfall is 38mm.
What is the chance of a hurricane in Kailua, Oahu in August?
On average less than 1 day in August in Kailua, Oahu is likely to be affected by the passage of one or more tropical storms.
Kailua, Oahu August sunrise & sunset times
Browse the sunrise and sunset times for Kailua, Oahu in August 2026. Select a month to view Kailua, Oahu sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Saturday, 1st August 2026 | 06:04 | 19:10 |
| Sunday, 16th August 2026 | 06:10 | 19:00 |
| Monday, 31st August 2026 | 06:14 | 18:48 |
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