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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

86°F

30°C

Humidity 65%
Wind Speed S 10 mph
Barometer 29.96 in (1014.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 9 Jul 3:56 pm EDT
Extended Forecast for

East Islip NY

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 71. Southwest wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. South wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before 2pm. Mostly cloudy, with a high near 81. Light and variable wind becoming east 5 to 7 mph in the morning.

    High: 81 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Low around 71. Southwest wind 3 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. South wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of showers and thunderstorms. Cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Friday
A 20 percent chance of showers before 2pm. Mostly cloudy, with a high near 81. Light and variable wind becoming east 5 to 7 mph in the morning.
Friday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Partly sunny, with a high near 81.
Saturday Night
Mostly cloudy, with a low around 69.
Sunday
Partly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 70.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Mostly cloudy, with a low around 72.
Wednesday
Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 ft)
Last Update:
1:32 pm EDT Jul 9, 2025
Forecast Valid:
4pm EDT Jul 9, 2025-6pm EDT Jul 16, 2025
 
Forecast Discussion
 
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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