Measurements:
°C
°F
Kailua Kona
74°F
NE 1 mph
Feels like: 74°F
Precip: 88%
World Resorts USA Kailua Kona Weather

Kailua Kona Sea Water Temperature

Current Sea Water Temperature:
+80.0°F
Maximum Sea Water Temperature in April: 82.2°F
Minimum Sea Water Temperature in April: 77.8°F
Average water temperature in April: 80.5°F

Sea Water Temperature for the Last 10 Days:

April 03 80.0°F March 29 80.6°F
April 02 80.2°F March 28 80.2°F
April 01 80.0°F March 27 80.2°F
March 31 80.2°F March 26 80.4°F
March 30 80.4°F March 25 80.6°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 22 days
December 20 days
February 19 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 79.9 °F
February 80.2 °F
March 81.0 °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 +46
Hawaii +74
Honolulu +74
Houston +74
Las Vegas +54
Los Angeles +56
Maui +66
Miami +74
Miami Beach +78
New York +40
San Diego +58
San Francisco +50
Sarasota +72
Tampa +72
Washington +48
24 Hours Weather Forecast
Kailua Kona
Local time: 23:49
03 apr, friday
0000 74°F
NE
1 mph
0300 72°F
S
5 mph
0600 72°F
S
6 mph
0900 74°F
N
1 mph
1200 76°F
E
3 mph
1500 76°F
E
3 mph
1800 74°F
N
3 mph
2100 74°F
N
4 mph