Last Update: 716 AM EDT Mon Sep 21 2026

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New York, NY Local Forecast Office

17NM SE Islip NY

Marine Zone Forecast

...SMALL CRAFT ADVISORY IN EFFECT THROUGH TUESDAY AFTERNOON... ...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY

Today
NE winds 20 to 25 kt, diminishing to 15 to 20 kt late. Seas 3 to 5 ft, occasionally to 6 ft. Wave detail: NE 5 ft at 6 seconds and SW 2 ft at 5 seconds. Chance of rain early this morning, then slight chance of rain late this morning.
Tonight
NE winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Seas 5 to 7 ft, occasionally to 9 ft. Wave detail: E 6 ft at 7 seconds and SE 1 ft at 8 seconds. Slight chance of rain after midnight.
Tue
NE winds around 25 kt with gusts up to 35 kt. Seas 5 to 8 ft, occasionally to 10 ft. Wave detail: E 8 ft at 7 seconds. Chance of rain, mainly in the morning.
Tue Night
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 7 to 10 ft, occasionally to 13 ft. Wave detail: E 10 ft at 8 seconds. Slight chance of showers after midnight.
Wed
NE winds 25 to 30 kt with gusts up to 45 kt. Seas 9 to 12 ft, occasionally to 15 ft. Wave detail: E 12 ft at 9 seconds. Slight chance of showers in the morning.
Wed Night
NE winds 25 to 30 kt with gusts up to 40 kt. Seas 10 to 13 ft, occasionally to 17 ft. Wave detail: E 13 ft at 10 seconds.
Thu
NE winds 25 to 30 kt with gusts up to 45 kt. Seas 10 to 13 ft, occasionally to 17 ft.
Thu Night
NE winds 25 to 30 kt with gusts up to 45 kt. Seas 10 to 14 ft, occasionally to 18 ft. Chance of showers.
Fri
N winds 30 to 35 kt with gusts up to 45 kt. Seas 11 to 15 ft, occasionally to 19 ft. Chance of showers.
Fri Night
N winds 30 to 35 kt with gusts up to 45 kt. Seas 11 to 15 ft, occasionally to 19 ft. Showers likely.



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716 AM EDT Mon Sep 21 2026
 
 

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