Koloa Weather in August
Koloa in August sees high temperatures, with highs around 28°C (82°F) and overnight lows of 24°C (75°F). Overall perfect conditions make it one of the better months to visit.
Rainfall in Koloa in August
Expect around 17 days of rain based on historical data, with 45 mm (1.8 in) average. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.
Temperature in Koloa in August
August is a perfect month in Koloa, with 28°C (82°F) during the day and 24°C (75°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Koloa in August
The month enjoys around 263 hours of sunshine, creating mostly sunny days with good weather conditions.
Wind Speed in Koloa in August
August has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.
Average water temperature in August
The water temperature is 27°C (81°F), which most people find very comfortable. A good month for swimming and water sports.To explore more travel options, our weather planner can help you discover destinations worldwide.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
Koloa Temperature in August
Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Water Temperature
27°C (81°F) *
Chance of Rain
56%
Precipitation
45 mm (1.8 in)
Rainy days
17 days
Humidity
74% *
Windspeed
5 m/s (10 knots) *
Sunshine
263 hours *
Percentage Sunshine
62% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koloa typically stay consistent throughout August, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Koloa in August
Browse day-by-day weather records for Koloa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koloa historical weather extremes in August
Our historical data for Koloa spans 1998 to 2025, revealing these weather extremes.
- The hottest August day on record in Koloa reached 32°C (90°F) (August 31, 2019).
- On August 1, 2006, Koloa saw its coldest August day with temperatures maxing out at 24°C (75°F).
- Koloa registered its coldest August night on August 16, 2022, with temperatures dropping to 20°C (68°F).
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
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What to Wear in Koloa in August
Warm but pleasant conditions in Koloa in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. The water temperature sits at about 27°C (81°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Koloa in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Koloa's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Koloa climate overview or explore weather in the United States of America.
