Measurements:
°C
°F
CURRENT WEATHER
05:12
Kailua Kona
76°F
S 4 mph
Feels like: 80°F
Precip: 10%
World Resorts USA Kailua Kona Weather

7 Day Weather Forecast

09.15
tue
DAY
82°F
E 7 mph
precip
13%
NIGHT
78°F
E 1 mph
precip
9%
09.16
wed
DAY
86°F
E 6 mph
precip
13%
NIGHT
80°F
S 2 mph
precip
9%
09.17
thu
DAY
84°F
SE 7 mph
precip
4%
NIGHT
80°F
N 2 mph
precip
60%
09.18
fri
DAY
84°F
NE 12 mph
precip
26%
NIGHT
78°F
N 7 mph
precip
26%
09.19
sat
DAY
84°F
E 6 mph
precip
15%
NIGHT
78°F
W 4 mph
precip
21%
09.20
sun
DAY
82°F
E 7 mph
precip
18%
NIGHT
78°F
NE 3 mph
precip
25%
09.21
mon
DAY
84°F
SE 6 mph
precip
7%
NIGHT
78°F
E 2 mph
precip
8%

Kailua Kona Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for Kailua Kona was 27.9°F. The maximum and minimum values were 27.6°F and 28.0°F respectively.

Kailua Kona on the Weather Map

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
October 85.5 °F
July 85.5 °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 6 mph
April 6 mph
June 6 mph
more details