Hurricanes and Tornadoes That Hit Shelter Island, NY

The nearest NOAA station with 1991–2020 climate normals is Bridgehampton, NY, 8 miles south of Shelter Island at 42 feet. July is the warmest, with an average high of 81°F and low of 64°F; January is the coolest, at 39°F and 23°F. December is the wettest at 5.0 inches of precipitation on average and July the driest at 3.2 inches; the year adds up to 49.8 inches over 78 days with at least a tenth of an inch. June to November, the hurricane season months, bring 49% of the year's precipitation (24.3 of 49.8 inches); the other six months are wetter. September has brought the most of the 61 tropical systems that passed within 75 miles (23); a normal September there has highs of 73°F and 4.8 inches of precipitation. Highs reach 90°F on about 5 days a year, almost all from July to August. Lows fall below freezing on about 106 nights a year. Snowfall averages 26.8 inches a year, most of it in February. That 49.8 inches is more than at 121 of the 137 New York stations used on this site (88%). Mattituck, 12 miles southwest, has its own station (Riverhead Rsch Farm, NY): 47.3 inches a year, 2.5 less than here, and a July average high of 84°F against 81°F.

Water temperature at the NOAA tide station Montauk, NY, 19 miles east, averaged 72°F in August and 39°F in February over 2021–2025. No month averaged 80°F. Sea level at the Montauk tide gauge, 19 miles from Shelter Island, has risen 1.42 ± 0.05 inches per decade from 1947 to 2025, NOAA's linear trend; at that pace it is 14.2 inches in a hundred years. That is faster than at 85 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 56 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Shelter Island: 36 thunderstorm wind reports, 15 flash floods and 5 lightning strikes. None is recorded as killing or injuring anyone; the NWS estimated $1.5 million in property and crop damage. The strongest thunderstorm gust on record here was 81 mph, on June 23, 2008. August has had the most flash floods, 6 of 15. Of the 798 New York cities on this site with a flash flood on record, 228 have had fewer than Shelter Island.

Flood insurance policyholders in Shelter Island's ZIP code 11964 have filed 80 claims with the National Flood Insurance Program since 1978, and were paid $1.3 million for buildings and contents, in the dollars of each year. The most came from Hurricane Sandy in 2012: 28 claims (35% of all) and $847,000, then December Storm - Nor'easter in 1992 with 10 and The "Halloween" Storm in 1991 with 10. 85% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 549 New York cities on this site with 10 or more claims, 352 have fewer than Shelter Island.