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.

Heavy Rain Fog/Mist

57°F

14°C

Humidity 93%
Wind Speed E 15 G 28 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 55°F (13°C)
Visibility 2.00 mi
Last update 11 Oct 6:56 pm EDT
Extended Forecast for

Holbrook NY

  • Tonight

    Tonight: Rain and thunderstorms before 2am, then rain likely and possibly a thunderstorm between 2am and 5am, then a chance of rain and thunderstorms after 5am. Low around 56. Breezy, with a northeast wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Rain and
    Breezy then
    Rain Likely

  • Columbus Day

    Columbus Day: A 30 percent chance of rain before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. Northeast wind 8 to 11 mph.

    High: 70 °F

    Chance Rain
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny through mid morning, then becoming mostly cloudy, with a high near 68. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 68 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 62. Southwest wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Rain and thunderstorms before 2am, then rain likely and possibly a thunderstorm between 2am and 5am, then a chance of rain and thunderstorms after 5am. Low around 56. Breezy, with a northeast wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Columbus Day
A 30 percent chance of rain before 8am. Cloudy through mid morning, then gradual clearing, with a high near 70. Northeast wind 8 to 11 mph.
Monday Night
Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.
Tuesday
Sunny through mid morning, then becoming mostly cloudy, with a high near 68. Light and variable wind becoming south 5 to 9 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 62. Southwest wind around 9 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 47.
Saturday
Partly sunny, with a high near 56. Breezy.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Holbrook NY
 40.8°N 73.06°W (Elev. 66 ft)
Last Update:
3:33 pm EDT Oct 11, 2026
Forecast Valid:
7pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation