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New York, NY Local Forecast Office

49NM SSE Islip NY

Marine Point Forecast

[NOTICE]

Tonight
N 11kt
3ft
Wednesday
NNW 12kt
3-4ft
Wednesday Night
SW 12kt
3-4ft
Thursday
⇑SSW 8kt
2-3ft
Thursday Night
S 12kt
2-3ft
Friday
SSW 13kt
3ft
Friday Night
SSW 13kt
2-3ft
Saturday
SSW 7kt
2ft
Saturday Night
SSE 7kt
2-3ft

Associated Zone Forecast which includes this point

Last Update: 2:20 pm EDT Jun 23, 2026
Forecast Valid: 10pm EDT Jun 23, 2026-6pm EDT Jun 30, 2026

View Nearby Observations

Detailed Forecast

Tonight

N wind 9 to 11 kt. Showers and possibly a thunderstorm before 11pm, then a chance of showers. Seas around 3 ft.

Wednesday

NNW wind 9 to 12 kt becoming W in the afternoon. Sunny. Seas 3 to 4 ft.

Wednesday Night

SW wind 7 to 12 kt. Mostly clear. Seas 3 to 4 ft.

Thursday

Variable winds less than 5 kt becoming SSW 5 to 8 kt in the afternoon. Mostly sunny. Seas 2 to 3 ft.

Thursday Night

S wind around 12 kt. Partly cloudy. Seas 2 to 3 ft.

Friday

SSW wind 11 to 13 kt. Partly sunny. Seas around 3 ft.

Friday Night

SSW wind 9 to 13 kt. A chance of thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers and possibly a thunderstorm after 2am. Seas 2 to 3 ft.

Saturday

SSW wind around 7 kt. Showers, mainly before 2pm. Seas around 2 ft.

Saturday Night

SSE wind 5 to 7 kt becoming N after midnight. A chance of showers. Seas 2 to 3 ft.

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.