Dangerous Heat Wave Continues; Severe Thunderstorms and Heavy Rain from the Central Plains to the Midwest

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. Severe thunderstorm are expected from the northern/central Plains to the Mid-Atlantic. Isolated slash flooding is possible from the central Plains to the Upper Midwest. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

For More Weather Information:

New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Tonight
W 6kt
< 1ft
Independence Day
SW 10kt
< 1ft
Saturday Night
SW 8kt
< 1ft
Sunday
E 9kt
< 1ft
Sunday Night
ESE 8kt
< 1ft
Monday
E 13kt
< 1ft
Monday Night
E 11kt
< 1ft
Tuesday
ENE 12kt
< 1ft
Tuesday Night
ENE 7kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 5:14 pm EDT Jul 3, 2026
Forecast Valid: 10pm EDT Jul 3, 2026-6pm EDT Jul 10, 2026

View Nearby Observations

Detailed Forecast

Tonight

W wind around 6 kt. Scattered showers and thunderstorms, mainly before 11pm. Seas 1 ft or less.

Independence Day

WNW wind 6 to 10 kt becoming SW in the afternoon. Scattered showers and thunderstorms after 2pm. Seas 1 ft or less.

Saturday Night

SW wind 5 to 8 kt becoming NNW after midnight. Scattered showers and thunderstorms. Seas 1 ft or less.

Sunday

ENE wind 6 to 9 kt becoming ESE in the afternoon. A chance of showers. Seas 1 ft or less.

Sunday Night

ESE wind around 8 kt. Showers likely and possibly a thunderstorm. Seas 1 ft or less.

Monday

E wind 11 to 13 kt. Showers likely, with thunderstorms also possible after 2pm. Seas 1 ft or less.

Monday Night

E wind 9 to 11 kt. Showers and possibly a thunderstorm. Seas 1 ft or less.

Tuesday

ENE wind 10 to 12 kt becoming ESE in the afternoon. Showers, with thunderstorms also possible after 2pm. Seas 1 ft or less.

Tuesday Night

ENE wind around 7 kt. A chance of showers and thunderstorms. 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.