Honolulu, Hawaii weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: January – December
What is the weather like in Honolulu, Hawaii in August?
In August, Honolulu, Hawaii is hot: daytime highs average 28 °C, and even at night it stays warm at around 25 °C. The sea averages 26.6 °C – lovely and warm for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 7 days, adding up to 23 mm. The air is often humid and muggy. All in all, August is an excellent month for a holiday in Honolulu, Hawaii.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 95 | 96 | 96 |
| Day | 27° | 28° | 28° |
| Night | 24° | 25° | 25° |
| Sea | 26° | 27° | 27° |
| Sun | 10 h | 9 h | 9 h |
| Rain days | 8 | 7 | 6 |
More details for August
- Daylight
- 12 h 53 min06:10 – 19:03
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or more
- Wind
- 23 km/haverage daily peak
- Cloud cover
- 42 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−10Pacific/Honolulu
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %81 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
Honolulu, Hawaii in August: quick answers
Is Honolulu, Hawaii hot in August?
Yes. In August, Honolulu, Hawaii is hot: daytime highs average 28 °C and nights stay around 25 °C.
Can you swim in Honolulu, Hawaii in August?
Yes. In August the sea averages 26.6 °C – lovely and warm for swimming.
Does it rain much in Honolulu, Hawaii in August?
Rain falls on about 7 days, adding up to 23 mm.
Honolulu, Hawaii month by month
The whole year in Honolulu, HawaiiAll destinations: USAHawaii weather in AugustWhere to go in AugustSea temperature in August
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)