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New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Friday
W 10kt
< 1ft
Friday Night
SW 7kt⇓
< 1ft
Saturday
SSE 10kt
< 1ft
Saturday Night
SSE 11kt
< 1ft
Sunday
SSE 10kt
< 1ft
Sunday Night
SSW 8kt
< 1ft
Monday
NNW 10kt
< 1ft
Monday Night
NE 8kt
< 1ft
Tuesday
SSE 9kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 3:39 am EDT Sep 11, 2026
Forecast Valid: 4am EDT Sep 11, 2026-6pm EDT Sep 17, 2026

View Nearby Observations

Detailed Forecast

Friday

N wind 6 to 10 kt becoming W in the afternoon. A chance of sprinkles before 8am. Seas 1 ft or less.

Friday Night

SW wind 5 to 7 kt becoming variable and less than 5 kt. Mostly clear. Seas 1 ft or less.

Saturday

ENE wind 6 to 10 kt becoming SSE in the afternoon. Mostly sunny. Seas 1 ft or less.

Saturday Night

SSE wind around 11 kt. A chance of showers, then showers and possibly a thunderstorm after 11pm. Seas 1 ft or less.

Sunday

SSE wind around 10 kt becoming WNW in the afternoon. Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm. Seas 1 ft or less.

Sunday Night

SSW wind 6 to 8 kt becoming WNW after midnight. Partly cloudy. Seas 1 ft or less.

Monday

NNW wind around 10 kt. Sunny. Seas 1 ft or less.

Monday Night

NE wind around 8 kt. Mostly clear. Seas 1 ft or less.

Tuesday

ENE wind around 9 kt becoming SSE 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.