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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Overnight
SSE 12kt
< 1ft
Friday
S 15kt
< 1ft
Friday Night
WSW 16kt
< 1ft
Saturday
NNW 19kt
< 1ft
Saturday Night
N 16kt
< 1ft
Sunday
N 9kt
< 1ft
Sunday Night
SW 7kt
< 1ft
Monday
S 9kt
< 1ft
Monday Night
SSE 8kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 2:36 pm EDT Oct 15, 2026
Forecast Valid: 12am EDT Oct 16, 2026-6pm EDT Oct 22, 2026

View Nearby Observations

Detailed Forecast

...SMALL CRAFT ADVISORY IN EFFECT FROM FRIDAY MORNING THROUGH

Overnight

SSE wind 10 to 12 kt. Showers likely, mainly after 5am. Seas 1 ft or less.

Friday

S wind 13 to 15 kt becoming SSW in the afternoon. Winds could gust as high as 21 kt. Showers before 2pm, then a chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Friday Night

WSW wind 11 to 16 kt becoming NW after midnight. A chance of showers and thunderstorms, then showers after 8pm. Seas 1 ft or less.

Saturday

NNW wind 16 to 19 kt. Cloudy through mid morning, then gradual clearing. Seas 1 ft or less.

Saturday Night

N wind 11 to 16 kt. Mostly clear. Seas 1 ft or less.

Sunday

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

Sunday Night

SW wind around 7 kt becoming NW after midnight. Mostly clear. Seas 1 ft or less.

Monday

NNW wind 5 to 9 kt becoming S in the afternoon. Sunny. Seas 1 ft or less.

Monday Night

SSE wind 6 to 8 kt becoming NNW in the evening. Partly cloudy. 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.