Weather in Kapaa, United States in September

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Visiting Kapaa, United States in September

September is one of the best months to visit Kapaa for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

The weather in September is slightly warmer than the previous month. September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 7.7hrs making the days quite long and bright.

September has total rainfall of 1.5cm (0.6inches) making it predominantly dry with occasional light showers on very few days. There are just 7.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

Sea temperatures are a very warm 28°C (82°F). September is an excellent month for swimming in Kapaa with very comfortable temperatures for bathing all day. The sea temperature in September is slightly warmer than the previous month.

Also consider visiting Kapaa in one of the other best months of May, July, August, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in Kapaa in September?

Yes, September is a good time for sunbathing in Kapaa.

September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 7.7hrs making the days quite long and bright. September has total rainfall of 1.5cm (0.6inches) making it predominantly dry with occasional light showers on very few days. There are just 7.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days.

More about September temperature and sunshine.

Can you swim in Kapaa in September?

Yes, September is an excellent month for swimming in Kapaa with very warm sea temperatures 28°C (82°F).

More about September sea temperatures.

Is September a good time to holiday in Kapaa?

Yes, September is a great time for a holiday in Kapaa.

September has average maximum temperatures of 30°C (86°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 7.7hrs making the days quite long and bright. September has total rainfall of 1.5cm (0.6inches) making it predominantly dry with occasional light showers on very few days. There are just 7.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days. Sea temperatures are a very warm 28°C (82°F). September is an excellent month for swimming in Kapaa with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is Kapaa warm in September?

Yes, Kapaa is very warm and perfect for sunbathing on clear days in September.

The average maximum temperature in Kapaa in September is 30°C (86°F). The average maximum temperature is 30°C (85°) in the previous month and 29°C (84°F) in the next month.

The average temperature in Kapaa in September is 26°C (80°F). The average temperature is 26°C (80°F) in the previous month and 26°C (79°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is Kapaa in September?

The average day light hours per day in Kapaa in September are 12.3. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 7.7hrs making the days quite long and bright.

More about September sunshine.

Temperature in Kapaa in September

The weather in September is slightly warmer than the previous month. The average maximum temperature in Kapaa in September is 30°C (86°F). The average maximum temperature is 30°C (85°F) in the previous month and 29°C (84°F) in the next month.

The average temperature in Kapaa in September is 26°C (80°F). The average temperature is 26°C (80°F) in the previous month and 26°C (79°F) in the next month.

The average minimum temperature in Kapaa in September is 23°C (73°F). The minimum temperature is 23°C (73°F) in the previous month and 23°C (73°F) in the next month.

Sunshine in Kapaa in September

The days in September are slightly shorter than the previous month and days continue to get slightly shorter into October. September has a slightly more hours of sunshine than the previous month. During September the average day light hours are 12.3 per day in Kapaa. The sunshine percentage is 63% making it sunny but overcast at times. The hours of sunshine per day are 7.7hrs making the days quite long and bright.

The ultraviolet index in Kapaa in September is typically 11.7 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Kapaa in September

The average sea water temperature in Kapaa in September is 27.7°C (81.9°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in September is slightly warmer than the previous month.

Rainfall in Kapaa in September

September weather is slightly drier than the previous month. September has a couple of more days of rain than the previous month and rainy days continue to rise slightly into October. The average total rainfall in Kapaa in September is 1.5cm (0.6inches) and on average there are 7.2 rainy days in September making it a quite rainy time to visit the beach.

Humidity in Kapaa in September

The maximum dew point (an indicator of humidity) in Kapaa in September is 21°C (69°F) which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 20°C (68°F) in the previous month and 21°C (21°F) in the next month.

The average maximum relative humidity in Kapaa in September is typically 72.9%. The maximum relative humidity is 69.9% in the previous month and 78% in the next month.

The average relative humidity in Kapaa in September is typically 62.8%. The average relative humidity is 59.2% in the previous month and 66.3% in the next month.

Wind Speed in Kapaa in September

The average maximum wind speed in Kapaa in September is typically 18KM/H (11MPH). The average maximum wind speed is 19KM/H (12MPH) in the previous month and 19KM/H (12MPH) in the next month.

The average wind speed in Kapaa in September is typically 7KM/H (5MPH). The average wind speed is 7KM/H (5MPH) in the previous month and 8KM/H (5MPH) in the next month.

The average wind direction in Kapaa in September is from the North.

Monthly Averages

Suggested Beaches in September

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.