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]

Late Afternoon
SSW 15kt
2-3ft
Tonight
SW 11kt
2-3ft
Independence Day
⇑SSW 13kt
2ft
Saturday Night
SW 9kt
2ft
Sunday
ESE 10kt
2ft
Sunday Night
ESE 9kt
2ft
Monday
E 15kt
3-4ft
Monday Night
ESE 15kt
3-4ft
Tuesday
E 15kt
3ft

Associated Zone Forecast which includes this point

Last Update: 3:34 pm EDT Jul 3, 2026
Forecast Valid: 4pm EDT Jul 3, 2026-6pm EDT Jul 10, 2026

View Nearby Observations

Detailed Forecast

Late Afternoon

SSW wind around 15 kt, with gusts as high as 21 kt. Scattered showers and thunderstorms after 5pm. Seas 2 to 3 ft.

Tonight

SW wind 7 to 11 kt becoming W after midnight. Scattered showers and thunderstorms before 2am. Seas 2 to 3 ft.

Independence Day

W wind 7 to 10 kt becoming SSW 10 to 13 kt in the afternoon. Scattered showers and thunderstorms after 2pm. Seas around 2 ft.

Saturday Night

SW wind 6 to 9 kt becoming WNW after midnight. Scattered showers and thunderstorms before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am, then a chance of showers after 2am. Seas around 2 ft.

Sunday

ENE wind 8 to 10 kt becoming ESE in the afternoon. A chance of showers, mainly before 2pm. Seas around 2 ft.

Sunday Night

ESE wind around 9 kt. Showers likely after 8pm. Seas around 2 ft.

Monday

E wind 12 to 15 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 3 to 4 ft.

Monday Night

ESE wind 13 to 15 kt. Showers likely and possibly a thunderstorm. Seas 3 to 4 ft.

Tuesday

E wind 13 to 15 kt. A chance of showers, with thunderstorms also possible after 2pm. Seas around 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.