Dangerous, Heat Wave Persists in the Eastern U.S.; Severe Weather Expected in the Central Plains and Mid-Atlantic

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorms are expected to produce damaging wind gusts from the Upper Ohio Valley into the Mid Atlantic, and across the central Great Plains this afternoon and evening. Large hail and heavy rain is also possible across the Great Plains. 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]

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
Tuesday Night
ENE 11kt
3-4ft
Wednesday
NE 9kt
3ft

Associated Zone Forecast which includes this point

Last Update: 11:18 pm EDT Jul 3, 2026
Forecast Valid: 2am EDT Jul 4, 2026-6pm EDT Jul 10, 2026

View Nearby Observations

Detailed Forecast

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. A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Seas around 2 ft.

Monday

E wind 12 to 15 kt. Showers likely and possibly a thunderstorm. 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.

Tuesday Night

ENE wind around 11 kt. A chance of showers and thunderstorms. Seas 3 to 4 ft.

Wednesday

NE wind around 9 kt becoming S in the afternoon. Partly sunny. 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.