Long Island Mosquito & Tick Report
Current seasonal activity estimates for Suffolk County and Nassau County homeowners. Conditions, impacted areas, and recommendations for this period.
Current Activity Levels
Current Conditions
Recent rain events have created standing water in low-lying yards, gutters, and containers across Long Island. Each rainfall resets the mosquito breeding cycle.
Elevated humidity extends mosquito activity into daytime hours. Coastal communities along both shores are seeing higher-than-average humidity levels.
Temperatures are within the peak mosquito activity range of 70–90°F. Overnight lows remain warm enough to sustain activity through the morning hours.
🦟 Mosquito Activity Estimate
High Activity — Long Island
Conditions are favorable for mosquito activity across most of Long Island this period. Properties near wetlands, canals, and wooded areas are seeing the highest pressure. The 7–10 days following any rainfall event typically produce the sharpest population spikes.
Suffolk County South Shore: Saltmarsh mosquito emergence from Great South Bay marshes is near seasonal peak. Canal communities in Babylon, Bay Shore, and Sayville are reporting elevated activity.
Suffolk County North Shore: Wooded properties in Huntington, Smithtown, and Port Jefferson are experiencing high activity driven by standing water and sustained canopy humidity.
Nassau County: Moderate-to-high activity concentrated in South Shore communities near Jones Beach, Freeport, and Massapequa. Central Nassau suburban areas reporting typical mid-season conditions.
🕷️ Tick Activity Estimate
Very High Activity — North Shore & East End
Deer tick activity is at or near peak seasonal levels across North Shore and East End communities. Adult blacklegged tick season is fully active. Properties with wooded borders, deer activity, and leaf litter are high-risk environments.
North Shore (Suffolk): Very high deer tick pressure throughout Huntington, Smithtown, Stony Brook, Port Jefferson, and Setauket. This is the highest-risk region on Long Island for Lyme disease exposure.
East End: Very high tick activity in Southampton, East Hampton, and Riverhead. Active deer populations and large wooded lots sustain elevated pressure through the fall.
Nassau North Shore: High activity in Oyster Bay, Syosset, and Old Westbury. Wooded estate properties face sustained deer tick pressure.
Reminder: Deer ticks are active any time temperatures are above 35°F. Fall tick season (September–November) is the second-highest risk window of the year after the June nymph peak.
Areas Seeing Elevated Activity
Smithtown
Wooded canopy and Nissequogue River corridor
Stony Brook
Harbor coves and tidal wetland breeding
Port Jefferson
Harbor waterfront and shaded hillside properties
Huntington
North Shore wooded lots and harbor influence
Babylon
Great South Bay saltmarsh emergence
Islip
South Shore bay proximity and canal networks
Massapequa
Freshwater preserve ponds and canal system
Freeport
Nautical Mile canals and South Shore bay access
Wantagh
Jones Beach wetland proximity
Homeowner Recommendations
- Inspect your property for standing water sources — gutters, tarps, containers, low yard areas
- Drain any water that has been sitting for more than 4–5 days
- Keep grass mowed and vegetation trimmed to reduce adult mosquito resting habitat
- Apply barrier spray treatments before outdoor events or gatherings
- Use EPA-registered repellent containing DEET or Picaridin when outdoors at dusk
- Perform full-body tick checks after any time spent in wooded or grassy areas
- Check pets for ticks every time they come inside during the active season
- Consider a professional mosquito and tick program for sustained season-long protection
High activity periods — act before conditions peak
Mosquito barrier treatments are most effective when applied before populations peak. If you have outdoor events, young children, or pets that use the yard regularly, scheduling treatment proactively gives better results than waiting until activity is visible.
Get a free estimate from PestifyThis report contains seasonal activity estimates based on historical Long Island mosquito and tick patterns, typical environmental conditions, and regional terrain factors. It is not a government health advisory or live surveillance data. For public health guidance on mosquito-borne and tick-borne illness, visit the NYS Department of Health website.
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