Measurements:
°C
°F
Kailua Kona
78°F
N 9 mph
Feels like: 82°F
Precip: 0%
World Resorts USA Kailua Kona Weather

Kailua Kona Sea Water Temperature

Current Sea Water Temperature:
+83.0°F
Maximum Sea Water Temperature in December: 84.2°F
Minimum Sea Water Temperature in December: 78.4°F
Average water temperature in December: 81.7°F

Sea Water Temperature for the Last 10 Days:

December 05 83.0°F November 30 83.0°F
December 04 83.2°F November 29 82.8°F
December 03 83.0°F November 28 82.6°F
December 02 82.8°F November 27 82.8°F
December 01 82.8°F November 26 82.8°F

When is the Warmest Sea for Kailua Kona?

According to our data for the last three years for Kailua Kona the highest average sea water temperature was in September, October and August.

Average Water Temperature by Month, °F

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Kailua Kona was 84.3°F. The maximum and minimum values were 83.4°F and 84.8°F respectively.

Sea Water Temperature in October

Select Year: 2025 2024 2023

The average sea surface temperature in October 2025 for Kailua Kona was 84.3°F. The maximum and minimum values were 83.8°F and 84.8°F respectively.

Sea Water Temperature in August

Select Year: 2025 2024 2023

The average sea surface temperature in August 2025 for Kailua Kona was 84.3°F. The maximum and minimum values were 84.0°F and 84.6°F respectively.

Best Time to Visit Kailua Kona
The most sunny months:
January 23 days
December 21 days
February 20 days
The most warm months:
September 86.0 °F
August 85.7 °F
July 85.7 °F
Warmest sea temperature:
September 84.8 °F
October 84.6 °F
August 84.4 °F
The most cold months:
January 80.1 °F
February 80.4 °F
March 81.1 °F
The most rainy months:
September 2 days
July 2 days
August 2 days
The most windy months:
May 7 mph
April 6 mph
June 6 mph

Kailua Kona on the Weather Map

USA Resorts:
NAME
Chicago -2
Hawaii +78
Honolulu +78
Houston +44
Las Vegas +40
Los Angeles +52
Maui +72
Miami +72
Miami Beach +80
New York +18
San Diego +54
San Francisco +46
Sarasota +62
Tampa +62
Washington +28
24 Hours Weather Forecast
Kailua Kona
Local time: 22:03
05 dec, friday
0000 76°F
NW
4 mph
0300 76°F
S
9 mph
0600 76°F
S
6 mph
0900 80°F
N
6 mph
1200 82°F
E
8 mph
1500 80°F
SE
11 mph
1800 78°F
N
4 mph
2100 78°F
N
8 mph