Southern New Jersey including communities across Camden, Burlington, Gloucester, Atlantic, Cumberland, and Cape May counties experiences a mix of coastal influence, humid summers, wet springs, and gradually warming autumns. These conditions create a long and active mosquito season stretching from April through October, with coastal marshes, pine forests, farmland, and suburban neighborhoods all contributing to seasonal mosquito pressure.
Weather plays a major role in determining when mosquitoes emerge, how rapidly they reproduce, and which species dominate throughout the year.
Spring (April–May)
Spring marks the beginning of mosquito season across Southern New Jersey.
Frequent rainfall, tidal flooding, and snowmelt saturate low-lying areas.
Woodland pools, saltmarsh depressions, clogged gutters, and roadside ditches become prime breeding sites.
Early-emerging Aedes species surge as temperatures warm into the 60s and 70s.
Summer (June–August)
Summer brings the highest mosquito pressure across the region.
High humidity and warm temperatures accelerate the mosquito life cycle to 7–10 days.
Afternoon thunderstorms and tropical moisture systems refill standing water from coast to inland communities.
Saltmarsh mosquitoes (common along the coastal counties) can hatch in massive numbers following tidal flooding.
Early Fall (September–October)
In recent years, warm autumn temperatures have prolonged mosquito season.
Mosquito activity continues as long as nighttime lows remain above the mid-50s.
Early fall rain events can trigger late-season hatches.
Culex species remain active, maintaining West Nile virus risk well into September.
Winter (November–March)
Cold temperatures reduce mosquito activity but do not eliminate the threat.
Eggs from many Aedes species overwinter in soil and containers.
Winter moisture primes the environment for strong spring hatching.
Mild winter warm-ups — which are increasingly common — can lead to brief periods of adult activity.
