Kapaa (HI) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kapaa.
Climate overview of Kapaa
Kapaa, Hawaii, United States of America, has a stable climate with little temperature variation across the year. Average daytime temperatures hover around 26°C (79°F), peaking in September at 28°C (82°F) and dipping in February to 24°C (75°F).
Kapaa sees a moderate amount of rainfall, totalling around 912 mm (36 in) per year. Sunshine peaks in August, when the city sees around 8.8 hours of sunshine per day.
Kapaa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kapaa - and find the best time to visit.
Monthly Temperature in Kapaa
With minimal seasonal shifts, Kapaa experiences a constant climate year-round. Average maximum daytime temperatures range from a comfortable 28°C (82°F) in September, the warmest time of the year, to a comfortable 24°C (75°F) during cooler months like February.
At night, you can expect temperatures ranging from 24°C (75°F) in September to around 20°C (68°F) during February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kapaa
Generally, Kapaa receives mid-range precipitation levels, with 912 mm (36 in) annually. Year-round, Kapaa has a balanced climate with minimal variation in precipitation. The difference between the wettest month, March, with 101 mm (4 in), and the driest month, September, with 65 mm (2.6 in), is minimal. For more details, please visit our Kapaa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Kapaa
While the amount of sunshine in Kapaa varies throughout the year, all seasons offer their own charm. Enjoy up to 8.8 hours of daily sun in August, and experience slightly darker atmosphere in December, with about 5.4 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Kapaa
The mean water temperature over the year ranges from 24°C (75°F) in January to 27°C (81°F) in August.
Water temperature over the year
Humidity in Kapaa by Month
The relative humidity is high throughout the year in Kapaa.
The city experiences its highest humidity in November, reaching 77%. In June, the humidity drops to its lowest level at 74%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Kapaa
The mean wind speed over the year ranges from 4 m/s (8 knots) in January, February, September, October and December to 5 m/s (10 knots) in March, April, May, June, July, August and November. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Kapaa
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February, April, May, June, July, August, September, October, November and December
- Warmest weather: June, July, August, September, October and November
- Most sunshine: July and August
- Fewer rainy days: January, February, May, June and September
- Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
Frequently asked questions about the climate in Kapaa
What is the best time to visit Kapaa?
January, February, April, May, June, July, August, September, October, November and December typically offer the most optimal weather in Kapaa. In contrast, March tends to have less optimal conditions.
What temperatures can I expect in Kapaa?
Daytime highs range from 24°C (75°F) in February to 28°C (82°F) in September. Nighttime lows range from 20°C (68°F) to 24°C (75°F). Temperatures stay relatively stable year-round.
How much rain does Kapaa get?
Annual rainfall is around 912 mm (36 in). March is the wettest month with 101 mm (4 in), while September is the driest with 65 mm (2.6 in).
How sunny is Kapaa?
Kapaa receives around 2,562 hours of sunshine per year. August is the sunniest month with 263 hours, while December is the cloudiest with just 161 hours. Overall, Kapaa enjoys abundant sunshine.
Kapaa 3-Day Forecast
Kapaa (HI) 3-Day Forecast
Kapaa on the map
Kapaa is highlighted - select any city to see its climate.
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