Flash flooding is the clearest hazard shaping a trip to Fire Island National Seashore, with 39 recorded flash flood events driving the bulk of the area's 123 hazard incidents. The seashore's narrow barrier island geography leaves little elevation to escape rapidly rising water, and thunderstorm wind events — six on record — can arrive with minimal warning and amplify flooding conditions. Suffolk County's violent crime rate of 400.6 per 100,000 also warrants attention, particularly in busier access areas.
When storms are forecast, move your group to the ferry dock or a permanent structure before conditions deteriorate, since tent sites offer no protection from sudden inundation. Pack a battery-powered NOAA weather radio, as cell service on the island is unreliable and official alerts may not reach your phone in time. In crowded day-use areas, keep valuables locked in your vehicle on the mainland rather than carrying them onto the island.
Top recorded hazards in Suffolk County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Flash Flood 39
- Thunderstorm Wind 6
- Hail 2
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About Fire Island National Seashore
Immerse yourself in an enchanting collage of coastal life and history. Rhythmic waves, high dunes, ancient maritime forests, historic landmarks and glimpses of wildlife, Fire Island has been a special place for diverse plants, animals and people for centuries. Far from the pressure of nearby big-city life, dynamic barrier island beaches offer solitude, camaraderie, and spiritual renewal.
Weather
Spring: Temperatures may range from high 30s to low 50s (F). Rain and sun are equally common. Summer: Temperatures usually range from 65 F to 90 F. Fall: Temperatures from 70 F in early autumn to 40 F later in the season may be expected. Winter: Temperatures in the 30s (F) are common, with below freezing temperatures possible.