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.

Light Drizzle

68°F

20°C

Humidity 84%
Wind Speed S 9 mph
Barometer 29.92 in (1013.1 mb)
Dewpoint 63°F (17°C)
Visibility 9.00 mi
Last update 20 Sep 5:56 pm EDT
Extended Forecast for

Old Field NY

  • Tonight

    Tonight: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 63. South wind 5 to 13 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 63 °F

    Rain Likely

  • Monday

    Monday: Partly sunny, with a high near 70. Northeast wind 11 to 17 mph.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 59. Northeast wind 13 to 16 mph.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A 50 percent chance of rain. Cloudy, with a high near 66. Northeast wind around 17 mph.

    High: 66 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 2am. Mostly cloudy, with a low around 57. Breezy, with a northeast wind 20 to 24 mph.

    Low: 57 °F

    Slight Chance
    Rain and
    Breezy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66. Breezy.

    High: 66 °F

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55. Breezy.

    Low: 55 °F

    Mostly Cloudy
    and Breezy

  • Thursday

    Thursday: Mostly cloudy, with a high near 66. Breezy.

    High: 66 °F

    Mostly Cloudy
    and Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 55. Breezy.

    Low: 55 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 63. South wind 5 to 13 mph becoming north after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Partly sunny, with a high near 70. Northeast wind 11 to 17 mph.
Monday Night
A 30 percent chance of rain after 2am. Mostly cloudy, with a low around 59. Northeast wind 13 to 16 mph.
Tuesday
A 50 percent chance of rain. Cloudy, with a high near 66. Northeast wind around 17 mph.
Tuesday Night
A 20 percent chance of rain before 2am. Mostly cloudy, with a low around 57. Breezy, with a northeast wind 20 to 24 mph.
Wednesday
Mostly cloudy, with a high near 66. Breezy.
Wednesday Night
Mostly cloudy, with a low around 55. Breezy.
Thursday
Mostly cloudy, with a high near 66. Breezy.
Thursday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 55. Breezy.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 67. Breezy.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56. Windy.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 68. Breezy.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Field NY
 40.94°N 73.14°W (Elev. 0 ft)
Last Update:
2:08 pm EDT Sep 20, 2026
Forecast Valid:
6pm EDT Sep 20, 2026-6pm EDT Sep 27, 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