Enter any address in Suffolk County, New York to see its FEMA flood zone
Flash flooding from heavy rainfall is the most frequent flood event in Suffolk County, NY, with 234 occurrences recorded in the last 30 years. Coastal flooding is also a significant concern, with 111 events and two reported fatalities. Recent examples include flash flooding events in July 2025, which caused vehicles to become stranded and led to multiple road closures due to heavy rainfall and thunderstorms.
National Flood Insurance Program (NFIP) data indicates that properties in Zone A have experienced the highest number of claims, with an average payout of $37,406 and an average water depth of 4.4 feet. Zone X properties have also seen substantial claims, averaging $23,449 with 2.8 feet of water. Residents in coastal areas, as well as those in Zone A and Zone X, should pay close attention to flood risk.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
134 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Suffolk County, New York has recorded 399 flood-related events since 1996 according to NOAA's Storm Events Database, including 234 flash floods and 27 river or area floods. The county has received 36 federal disaster declarations, 3 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1965–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storm And Flooding | Severe Storm | Aug 18, 2024 |
| Severe Winter Storm And Snowstorm | Snowstorm | Dec 23, 2022 |
| Remnants Of Hurricane Ida | Hurricane | Sep 1, 2021 |
| Hurricane Henri | Hurricane | Aug 21, 2021 |
| Tropical Storm Isaias | Hurricane | Aug 4, 2020 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Winter Storm And Snowstorm | Snowstorm | Mar 14, 2017 |
| Severe Winter Storm And Snowstorm | Severe Storm | Feb 8, 2013 |
| Hurricane Sandy | Hurricane | Oct 27, 2012 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jul 31, 2025 | 0.00K |
| Flash Flood | Aug 19, 2024 | 0.00K |
| Flash Flood | Aug 19, 2024 | 500.00K |
| Flash Flood | Aug 19, 2024 | 100.00K |
| Flash Flood | Aug 19, 2024 | 25.00K |
| Flash Flood | Aug 19, 2024 | 10.00K |
| Flash Flood | Aug 18, 2024 | 0.00K |
| Flash Flood | Aug 18, 2024 | 20.00K |
| Coastal Flood | Jan 13, 2024 | 0.00K |
| Coastal Flood | Jan 10, 2024 | 0.00K |
Flash Flood — Jul 31, 2025
A slow moving frontal boundary moved over the local area triggering heavy rainfall and thunderstorms across NJ and NYC causing flash flooding across the area resulting in vehicles being stranded and multiple road closures.
Flash Flood — Aug 19, 2024
A frontal system over the area on August 18th and into the early morning hours of August 19th allowed for the development of multiple rounds of slow moving heavy thunderstorms which resulted in widespread significant to catastrophic flash flooding for portions of Southeast New York, specifically for the north shore of Long Island. Several rounds of rain moved through during the day on August 18...
Flash Flood — Aug 18, 2024
A frontal system over the area on August 18th and into the early morning hours of August 19th allowed for the development of multiple rounds of slow moving heavy thunderstorms which resulted in widespread significant to catastrophic flash flooding for portions of Southeast New York, specifically for the north shore of Long Island. Several rounds of rain moved through during the day on August 18...
Coastal Flood — Jan 13, 2024
Strong low pressure shifted northeast through the eastern Great Lakes on January 13, 2024, sending a warm front through during the morning hours, followed quickly by a cold front. Strong winds produced by this system, combined with peaking high astronomical tides associated with a recent new moon, produced widespread moderate to major coastal flooding along the entire southeast New York coastli...
Coastal Flood — Jan 10, 2024
Strong low pressure moving northeast from the Mid Atlantic region to southern New England during the night of January 9, 2024 into the early morning hours of January 10, 2024 produced high winds, which combined with high astronomical tides associated with an upcoming new moon to produce widespread moderate to major coastal flooding along the south shore of Long Island and along the Hudson River...
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Suffolk County, New York:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Suffolk County, New York that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.