National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

76°F

24°C

Humidity 88%
Wind Speed S 9 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 1 Aug 7:56 pm EDT
Extended Forecast for

East Islip NY

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 74. South wind around 8 mph.

    Low: 74 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 81. South wind 7 to 13 mph.

    High: 81 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 71. Southeast wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 81. South wind around 14 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 82.

    High: 82 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 74. South wind around 8 mph.
Sunday
Mostly cloudy, with a high near 81. South wind 7 to 13 mph.
Sunday Night
A slight chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 71. Southeast wind 8 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm. High near 81. South wind around 14 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers before 8am. Partly sunny, with a high near 82.
Tuesday Night
Mostly cloudy, with a low around 70.
Wednesday
Partly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 73.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 84.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 ft)
Last Update:
2:00 pm EDT Aug 1, 2026
Forecast Valid:
8pm EDT Aug 1, 2026-6pm EDT Aug 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation