Dangerous Heat Wave Continues; Enhanced Area of Severe Thunderstorms Today

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Widespread moderate to extreme HeatRisk is forecast. Scattered wind damage and large hail are expected from severe thunderstorms impacting parts of Nebraska into Iowa today. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

New York, NY Local Forecast Office

15NM SW Islip NY

Marine Point Forecast

[NOTICE]

This Afternoon
SSW 14kt
2ft
Tonight
SW 10kt
2-3ft
Independence Day
⇑SSW 12kt
2ft
Saturday Night
WSW 9kt
2ft
Sunday
ESE 10kt
2ft
Sunday Night
ESE 9kt
2ft
Monday
E 17kt
2-3ft
Monday Night
E 17kt
3-4ft
Tuesday
E 17kt
3-4ft

Associated Zone Forecast which includes this point

Last Update: 5:22 am EDT Jul 3, 2026
Forecast Valid: 12pm EDT Jul 3, 2026-6pm EDT Jul 9, 2026

View Nearby Observations

Detailed Forecast

This Afternoon

SSW wind 9 to 14 kt. Sunny. Seas around 2 ft.

Tonight

SW wind 6 to 10 kt becoming NW after midnight. A chance of showers and thunderstorms, mainly between 10pm and 2am. Seas 2 to 3 ft.

Independence Day

W wind 6 to 9 kt becoming SSW 9 to 12 kt in the afternoon. A slight chance of showers and thunderstorms after 4pm. Seas around 2 ft.

Saturday Night

WSW wind 6 to 9 kt becoming NNW after midnight. A chance of showers and thunderstorms. Seas around 2 ft.

Sunday

NE wind 7 to 10 kt becoming ESE in the afternoon. A chance of showers, with thunderstorms also possible after 5pm. Seas around 2 ft.

Sunday Night

ESE wind around 9 kt. A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers likely after 2am. Seas around 2 ft.

Monday

E wind 13 to 17 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 2 to 3 ft.

Monday Night

E wind 15 to 17 kt. Showers likely and possibly a thunderstorm. Seas 3 to 4 ft.

Tuesday

E wind 15 to 17 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas 3 to 4 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.