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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Late Afternoon
ENE 17kt
< 1ft
Tonight
ENE 21kt⇓
< 1ft
Friday
N 22kt⇓
< 1ft
Friday Night
N 13kt
< 1ft
Saturday
NW 14kt
< 1ft
Saturday Night
WNW 14kt
< 1ft
Sunday
NW 14kt
< 1ft
Sunday Night
NW 10kt
< 1ft
Monday
NW 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 4:06 pm EST Nov 12, 2026
Forecast Valid: 4pm EST Nov 12, 2026-6pm EST Nov 19, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 PM EST THIS EVENING...

Late Afternoon

ENE wind around 17 kt. Showers. Seas 1 ft or less.

Tonight

ENE wind 18 to 21 kt decreasing to 15 to 18 kt after midnight. Winds could gust as high as 29 kt. Showers before midnight, then rain after midnight. Seas 1 ft or less.

Friday

N wind 19 to 22 kt decreasing to 16 to 19 kt in the afternoon. Winds could gust as high as 29 kt. Rain, mainly before 4pm. Seas 1 ft or less.

Friday Night

N wind 11 to 13 kt. A chance of rain before 10pm. Seas 1 ft or less.

Saturday

NW wind 11 to 14 kt. Partly sunny. Seas 1 ft or less.

Saturday Night

WNW wind around 14 kt. Partly cloudy. Seas 1 ft or less.

Sunday

NW wind around 14 kt. Mostly sunny. Seas 1 ft or less.

Sunday Night

NW wind 7 to 10 kt. Partly cloudy. Seas 1 ft or less.

Monday

NW wind around 8 kt. Sunny. Seas 1 ft or less.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.