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.

Mostly Cloudy

72°F

22°C

Humidity 91%
Wind Speed S 8 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 27 Aug 5:56 am EDT
Extended Forecast for

Old Field NY

  • Today

    Today: A chance of showers and thunderstorms between 2pm and 5pm. Partly sunny, with a high near 80. South wind 8 to 14 mph. Chance of precipitation is 30%.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly between 11pm and 2am. Increasing clouds, with a low around 71. South wind 6 to 11 mph.

    Low: 71 °F

    Chance
    Showers

  • Friday

    Friday: A slight chance of showers before 11am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 79 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 70. Light and variable wind becoming north around 6 mph after midnight.

    Low: 70 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms between 2pm and 5pm. Partly sunny, with a high near 80. South wind 8 to 14 mph. Chance of precipitation is 30%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly between 11pm and 2am. Increasing clouds, with a low around 71. South wind 6 to 11 mph.
Friday
A slight chance of showers before 11am, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 70. Light and variable wind becoming north around 6 mph after midnight.
Saturday
Mostly sunny, with a high near 79. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Partly sunny, with a high near 81.
Monday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers. Partly sunny, with a high near 79.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 71.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Field NY
 40.96°N 73.14°W (Elev. 30 ft)
Last Update:
3:06 am EDT Aug 27, 2026
Forecast Valid:
6am EDT Aug 27, 2026-6pm EDT Sep 2, 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