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.

Fair

74°F

23°C

Humidity 71%
Wind Speed SW 13 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 1 Jul 12:56 am EDT
Extended Forecast for

Kings Park NY

Extreme Heat Watch July 3, 09:00pm until July 4, 09:00pm
Extreme Heat Warning July 1, 12:00pm until July 3, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Extreme Heat Warning

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 11 mph.

    Low: 71 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 92. Heat index values as high as 97. Southwest wind 10 to 15 mph.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers. Partly cloudy, with a low around 74. Southwest wind 10 to 13 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 99. Heat index values as high as 109. Southwest wind 7 to 13 mph.

    High: 99 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 78. Southwest wind 6 to 10 mph.

    Low: 78 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 102.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Independence Day

    Independence Day: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.

    Low: 74 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. Southwest wind around 11 mph.
Wednesday
Sunny, with a high near 92. Heat index values as high as 97. Southwest wind 10 to 15 mph.
Wednesday Night
A chance of showers and thunderstorms between 11pm and 2am, then a slight chance of showers. Partly cloudy, with a low around 74. Southwest wind 10 to 13 mph. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 99. Heat index values as high as 109. Southwest wind 7 to 13 mph.
Thursday Night
Clear, with a low around 78. Southwest wind 6 to 10 mph.
Friday
Sunny and hot, with a high near 102.
Friday Night
Partly cloudy, with a low around 77.
Independence Day
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 85.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 69.
Tuesday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Kings Park NY
 40.89°N 73.24°W (Elev. 171 ft)
Last Update:
7:34 pm EDT Jun 30, 2026
Forecast Valid:
1am EDT Jul 1, 2026-6pm EDT Jul 7, 2026
 
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