Mosquito season in Brevard County, FL: when it starts and ends

Mosquito months in Brevard County

In a normal year mosquito season in Brevard County, FL starts around January 15 and ends around January 10, about 51 weeks.

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 Brevard County, and when

• Start tipping out standing water weekly by January 1.
• Book any yard treatment for mid January, ahead of the August peak.
• Repellent can go away after January 10.
• 2 West Nile cases since 2016 (last 2024): you should use repellent at dusk April to October, more so if over 60.

Brevard County against the rest of FL

Brevard County has the 21st longest season of 67 FL counties, at 360 days against 365 in Broward County and 281 in Gilchrist County. Its mean temperature is 73.1°F.

• Lake County: January 17 to January 13 (361 days, 1 WNV)
• Glades County: January 18 to January 14 (361 days, 1 WNV)
• Sarasota County: January 15 to January 9 (359 days, 2 WNV)
• Hendry County: January 20 to January 14 (359 days, 0 WNV)

West Nile in Brevard County

From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Brevard County (6 neuroinvasive) across 6 years. The worst was 2004 with 4; the latest was 2024.

Background: where mosquitoes never stop; how the dates are worked out.