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New York, NY Local Forecast Office

9NM SW Islip NY

Marine Point Forecast

[NOTICE]

Today
NW 9kt
< 1ft
Tonight
NNW 9kt
< 1ft
Thursday
⇑SSW 11kt
< 1ft
Thursday Night
SSW 15kt
< 1ft
Friday
SW 11kt
< 1ft
Friday Night
SW 9kt
< 1ft
Saturday
N 8kt
< 1ft
Saturday Night
N 6kt
< 1ft
Sunday
N 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 1:38 am EDT Aug 27, 2025
Forecast Valid: 11am EDT Aug 27, 2025-6pm EDT Sep 2, 2025

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Detailed Forecast

Today

NW wind around 9 kt becoming W in the afternoon. Sunny. Seas 1 ft or less.

Tonight

NNW wind 5 to 9 kt. Mostly clear. Seas 1 ft or less.

Thursday

Variable winds less than 5 kt becoming SSW 6 to 11 kt in the morning. Mostly sunny. Seas 1 ft or less.

Thursday Night

SSW wind 13 to 15 kt. A slight chance of showers and thunderstorms after 2am. Seas 1 ft or less.

Friday

SW wind around 11 kt. A slight chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Seas 1 ft or less.

Friday Night

SW wind around 9 kt becoming N after midnight. A chance of thunderstorms before 8pm. Seas 1 ft or less.

Saturday

N wind 6 to 8 kt becoming WSW in the afternoon. Sunny. Seas 1 ft or less.

Saturday Night

S wind around 6 kt becoming N after midnight. Mostly clear. Seas 1 ft or less.

Sunday

N wind around 7 kt becoming ESE in the afternoon. Sunny. Seas 1 ft or less.

Winds and seas may be higher in and near tstms.

*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.