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.

Overcast

40°F

4°C

Humidity 53%
Wind Speed E 8 mph
Barometer 30.06 in (1018.0 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 19 Feb 12:56 pm EST
Extended Forecast for

Holbrook NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 41. East wind around 10 mph.

    High: 41 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 50 percent chance of rain after 4am. Cloudy, with a steady temperature around 35. East wind 5 to 7 mph.

    Low: 35 °F

    Cloudy then
    Chance Rain

  • Friday

    Friday: Rain, mainly after 7am. High near 41. East wind 8 to 14 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 41 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 31. Northeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 31 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 42. Light and variable wind becoming northwest 5 to 7 mph in the morning.

    High: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Sunday

    Sunday: A 40 percent chance of snow after 1pm. Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow. Cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

  • Monday

    Monday: A 40 percent chance of snow before 1pm. Cloudy, with a high near 35.

    High: 35 °F

    Chance Snow

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 41. East wind around 10 mph.
Tonight
A 50 percent chance of rain after 4am. Cloudy, with a steady temperature around 35. East wind 5 to 7 mph.
Friday
Rain, mainly after 7am. High near 41. East wind 8 to 14 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 50 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 31. Northeast wind 5 to 7 mph becoming light and variable after midnight.
Saturday
A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 42. Light and variable wind becoming northwest 5 to 7 mph in the morning.
Saturday Night
A chance of rain and snow before 10pm, then a chance of snow between 10pm and 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Sunday
A 40 percent chance of snow after 1pm. Mostly cloudy, with a high near 37.
Sunday Night
A 50 percent chance of snow. Cloudy, with a low around 27.
Monday
A 40 percent chance of snow before 1pm. Cloudy, with a high near 35.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
Sunny, with a high near 35.
Tuesday Night
Partly cloudy, with a low around 22.
Wednesday
Mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NY
 40.8°N 73.09°W (Elev. 98 ft)
Last Update:
10:22 am EST Feb 19, 2026
Forecast Valid:
1pm EST Feb 19, 2026-6pm EST Feb 25, 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