Long Island Mosquito & Tick Seasonal Risk Estimate
Seasonal risk estimates for Suffolk and Nassau County homeowners, based on temperature, humidity, rainfall patterns, and typical Long Island mosquito and tick activity.
This is a seasonal risk estimate based on common Long Island mosquito and tick activity patterns. It is not a government health advisory or live mosquito surveillance feed.
Suffolk County
Overall: High Risk · Trend: Increasing
Recent rainfall: 0.8 inches (last 5 days)
Recent rainfall has created abundant standing water throughout western Suffolk. Aedes albopictus populations are near peak seasonal levels. Deer tick nymph activity remains high in wooded areas.
High activity — treatment is strongly recommended this week.
Nassau County
Overall: Moderate Risk · Trend: Stable
Recent rainfall: 0.4 inches (last 5 days)
Nassau County is seeing moderate mosquito activity with isolated high-risk zones near marshes. Tick activity remains high countywide due to active deer populations and warm overnight temperatures.
Factors Affecting Today's Forecast
Rainfall Impact
Standing water from recent rain creates breeding sites. Populations typically peak 7–10 days after rain events.
Temperature
Mosquitoes are most active between 70–90°F. Today's temps are in the peak activity range for most Long Island species.
Humidity
High humidity (above 60%) extends mosquito activity into the day. Aedes albopictus thrives in humid conditions.
Seasonal Pressure
We're in peak season for both mosquitoes and deer ticks in Suffolk and Nassau counties.