Mosquito season in Atlantic County, NJ: when it starts and ends
Mosquito months in Atlantic County
In a normal year mosquito season in Atlantic County, NJ starts around April 7 and ends around November 6, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Atlantic County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 6.
- 8 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.
Atlantic County against the rest of NJ
Atlantic County has the 3rd longest season of 21 NJ counties, at 213 days against 217 in Cape May County and 184 in Sussex County. Its mean temperature is 55.2°F.
- Cape May County: April 5 to November 8 (217 days, 4 WNV)
- Salem County: April 4 to November 5 (215 days, 1 WNV)
- Hudson County: April 7 to November 5 (212 days, 6 WNV)
- Camden County: April 6 to November 3 (211 days, 22 WNV)
West Nile in Atlantic County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Atlantic County (7 neuroinvasive) across 9 years. The worst was 2025 with 2; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.