Hawaii weather in August
Averages for 2 places in Hawaii in August, from 30 years of weather data.
Holiday weather in August
Excellent
Best time to visit: January – December
Places in Hawaii in August
Sorted by holiday weather score. Each place links to its own page for August.
| Place | Score | Day | Night | Sea | Sun | Rain days |
|---|---|---|---|---|---|---|
| Kihei, Maui | 98 | 29° | 24° | 26° | 9 h | 3 |
| Honolulu | 96 | 28° | 25° | 27° | 9 h | 7 |
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 97 | 97 | 96 |
| Day | 28° | 29° | 29° |
| Night | 24° | 25° | 25° |
| Sea | 26° | 27° | 27° |
| Sun | 10 h | 9 h | 9 h |
| Rain days | 5 | 5 | 4 |
Hawaii in August: quick answers
Is it warm in Hawaii in August?
Yes, it is hot. Daytime highs average 29 °C (28–29 °C by place) and nights 25 °C.
Can you swim in Hawaii in August?
Yes. The sea is 26–27 °C, 27 °C on average.
Where is it warmest in Hawaii in August?
The warmest are Kihei, Maui (29 °C) and Honolulu (28 °C).
Does it rain much in Hawaii in August?
Now and then: 5 rainy days on average. Plus 9 hours of sunshine a day.
Is August a good time to visit Hawaii?
Yes, August is one of the best months, with a holiday weather score of 97 out of 100. Best time overall: January – December.
Hawaii month by month
Hawaii: weather by monthWhere to go in AugustSea temperature in August
More islands & regions
USA: all destinationsAll islands & regions
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)