Kapaa
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Kapaa Weather in September

September in Kapaa averages 28°C (82°F) during the day and 24°C (75°F) at night. With just 65 mm (2.6 in) of rainfall on average, it doesn't get much drier than this.

Rainfall in Kapaa in September

The month is known for having the least rain of the year. Make the most of the sunshine and clear skies. On average, there are about 16 days with rain during this month, averaging 65 mm (2.6 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Kapaa in September

September tends to be one of the excellent months in Kapaa, with 28°C (82°F) in the afternoon and 24°C (75°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.

Sunshine in Kapaa in September

Enjoy a sunny month with about 242 hours of sunshine, the clear skies make Kapaa even more beautiful.

Wind Speed in Kapaa in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

The water is 27°C (81°F) this month, warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

Kapaa Temperature in September

Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Water Temperature
27°C (81°F) *
Chance of Rain
52%
Precipitation
65 mm (2.6 in)
Rainy days
16 days
Humidity
74% *
Windspeed
4 m/s (8 knots) *
Sunshine
242 hours *
Percentage Sunshine
66% *
* Data from: Lihue, the United States of America (8 KM, 5 Miles).

Kapaa Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Kapaa - and find the best time to visit.

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Kapaa in September

Warm but pleasant conditions in Kapaa in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. With water temperatures around 27°C (81°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Kapaa in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    9/10
  • Cycling
    8/10
  • Walking
    8/10
  • Camping
    8/10
  • Outdoor sports
    8/10

Kapaa 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.