Weather forecast for 10 daysKapaau, HI

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 82°F
  • 73°F
Mostly Sunny / Wind
Mostly Sunny / Wind
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 27mphENE 74°
  • Humidity: 69%
  • UV index: 10
  • Sunrise: 6:19 am HST
  • Sunset: 5:57 pm HST
  • ▼
On Sunday, in Kapaau, strong breezes will persist under mostly sunny skies.
A daytime temperature reaching up to a moderately hot 82.4°F will subtly contrast with a nighttime low of a temperate 73.4°F.
The maximum heat index, which measures the combined effect of heat and moisture, is computed to be a tropical 87.8°F. Take into consideration that the heat index values are calculated for shade and light wind conditions.
Today, the highest expected temperature will be significantly higher than October's typical maximum of 65.5°F.
Sunrise will be at 6:19 am and sunset at 5:57 pm; the daylight will last for 11h and 38min.

10-day overview

Daily temperatures

Maximum temperature: 84°C.
Minimum temperature: 82°C.

Chance of precipitation

Highest chance: Tuesday 27.10. 24%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 82°F
  • 73°F
Mostly Sunny / Wind
Mostly Sunny / Wind
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 27mphENE 74°
  • Humidity: 69%
  • UV index: 10
  • Sunrise: 6:19 am HST
  • Sunset: 5:57 pm HST
  • ▼
  • Monday
  • Oct 19, 2026
  • 84°F
  • 73°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 26mphENE 77°
  • Humidity: 68%
  • UV index: 10
  • Sunrise: 6:19 am HST
  • Sunset: 5:56 pm HST
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 82°F
  • 73°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 27mphENE 76°
  • Humidity: 66%
  • UV index: 10
  • Sunrise: 6:20 am HST
  • Sunset: 5:55 pm HST
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 84°F
  • 73°F
Partly Cloudy / Wind
Partly Cloudy / Wind
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 22mphENE 77°
  • Humidity: 63%
  • UV index: 10
  • Sunrise: 6:20 am HST
  • Sunset: 5:55 pm HST
  • ▼
  • Thursday
  • Oct 22, 2026
  • 84°F
  • 73°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 19mphENE 75°
  • Humidity: 65%
  • UV index: 10
  • Sunrise: 6:20 am HST
  • Sunset: 5:54 pm HST
  • ▼
  • Friday
  • Oct 23, 2026
  • 84°F
  • 73°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 18mphENE 68°
  • Humidity: 68%
  • UV index: 9
  • Sunrise: 6:21 am HST
  • Sunset: 5:53 pm HST
  • ▼
  • Saturday
  • Oct 24, 2026
  • 84°F
  • 73°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 16%
  • Precipitation: 0"
  • Wind: 17mphENE 66°
  • Humidity: 71%
  • UV index: 7
  • Sunrise: 6:21 am HST
  • Sunset: 5:53 pm HST
  • ▼
  • Sunday
  • Oct 25, 2026
  • 84°F
  • 73°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 19mphENE 64°
  • Humidity: 71%
  • UV index: 8
  • Sunrise: 6:22 am HST
  • Sunset: 5:52 pm HST
  • ▼
  • Monday
  • Oct 26, 2026
  • 84°F
  • 73°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 21%
  • Precipitation: 0"
  • Wind: 19mphENE 67°
  • Humidity: 71%
  • UV index: 8
  • Sunrise: 6:22 am HST
  • Sunset: 5:51 pm HST
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 84°F
  • 72°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 18mphENE 66°
  • Humidity: 70%
  • UV index: 8
  • Sunrise: 6:22 am HST
  • Sunset: 5:51 pm HST
  • ▼
Forecasts for the ten-day outlook show that primarily overcast and occasionally bright weather is forecasted.
Rainfall is not predicted in Kapaau in the upcoming period.
Temperature variation will be minimal in the upcoming days. Maximum temperatures will fall between 82.4°F and 84.2°F, while the lowest nighttime temperatures will be also relatively consistent, as the minimum temperature is expected to range between 71.6°F and 73.4°F.
Over the coming ten days, daily highs will consistently reach 84.2°F; Sunday and Tuesday, with the highest temperature of 82.4°F, will be the coldest days in Kapaau, Hawaii.
Including the humidity's impact, the maximum feel-like temperature may increase and vary between a hot 86°F and a blazing 91.4°F.
Updated: Oct 18, 2026 @ 10:09:19 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in Kapaau, sunny weather will prevail, but winds will remain steady.

Today, the highest temperature in Kapaau will be 82.4°F, while the lowest temperature will be 73.4°F. The maximum heat index, which modifies the air temperature to account for humidity, is assessed at 87.8°F.
The maximum temperature will be notably higher than the average highest temperature of 65.5°F in October. Today, the lowest temperature will be also uncommonly higher than the average low of 58.5°F.

On Sunday, in Kapaau, sunrise will be at 6:19 am and sunset at 5:57 pm (HST).

In Kapaau, today, there will be 11h and 38min of daylight.