Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

For More Weather Information:

New York, NY Local Forecast Office

18NM WSW Islip NY

Marine Point Forecast

[NOTICE]

Today
NNE 9kt⇓
< 1ft
Tonight
SSW 7kt
< 1ft
Sunday
⇑S 13kt
< 1ft
Sunday Night
SSW 13kt⇓
< 1ft
Monday
Light Wind
< 1ft
Monday Night
S 6kt⇓
< 1ft
Tuesday
SE 10kt
< 1ft
Tuesday Night
SSE 8kt
< 1ft
Wednesday
S 9kt
< 1ft

Associated Zone Forecast which includes this point

Last Update: 6:45 am EDT Aug 29, 2026
Forecast Valid: 9am EDT Aug 29, 2026-6pm EDT Sep 4, 2026

View Nearby Observations

Detailed Forecast

Today

NNE wind 5 to 9 kt becoming variable and less than 5 kt. Mostly sunny. Seas 1 ft or less.

Tonight

SSW wind around 7 kt becoming WSW after midnight. Mostly clear. Seas 1 ft or less.

Sunday

WSW wind 6 to 9 kt becoming S 10 to 13 kt in the afternoon. A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Seas 1 ft or less.

Sunday Night

SSW wind 10 to 13 kt becoming W 7 to 10 kt after midnight. A chance of showers and thunderstorms. Seas 1 ft or less.

Monday

Variable winds 5 kt or less. A slight chance of showers. Seas 1 ft or less.

Monday Night

S wind around 6 kt becoming variable and less than 5 kt after midnight. A chance of showers. Seas 1 ft or less.

Tuesday

SE wind 6 to 10 kt. A chance of showers. Seas 1 ft or less.

Tuesday Night

SSE wind around 8 kt. Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Seas 1 ft or less.

Wednesday

S wind 7 to 9 kt. A chance of showers. 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.