Mosquito season in Kauai County, HI: when it starts and ends

Mosquito months in Kauai County

Mosquitoes in Kauai County, HI can be active in any month. The worst stretch is January to December.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Kauai County, and when

• No off-season here: tip out standing water every week, all year.
• A yard treatment matters most January to December.
• No West Nile cases since 2016, so bites in Kauai County are a nuisance; check window screens.

Kauai County against the rest of HI

Kauai County has the 3rd longest season of 5 HI counties, at 365 days against 365 in Honolulu County and 272 in Hawaii County. Its mean temperature is 75.6°F.

• Honolulu County: all year (365 days, 1 WNV)
• Kalawao County: all year (365 days, 0 WNV)
• Maui County: all year (365 days, 0 WNV)
• Hawaii County: March 26 to December 23 (272 days, 0 WNV)

West Nile in Kauai County

CDC ArboNET lists no human West Nile cases for Kauai County from 1999 to 2025.

See how the dates are worked out, and where mosquitoes never stop.