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 Fog/Mist

58°F

14°C

Humidity 93%
Wind Speed SW 8 mph
Barometer 29.77 in (1008.0 mb)
Dewpoint 56°F (13°C)
Visibility 0.50 mi
Last update 26 Nov 11:56 am EST
Extended Forecast for

Islip NY

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly after 4pm. Patchy fog. Otherwise, mostly cloudy, with a temperature falling to around 57 by 5pm. Southwest wind around 10 mph.

    High: 60 °F⇓

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers before 10pm. Patchy fog before 10pm. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 36. West wind 7 to 17 mph, with gusts as high as 33 mph.

    Low: 36 °F

    Chance
    Showers and
    Patchy Fog
    then Partly
    Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 45. Breezy, with a west wind 16 to 20 mph, with gusts as high as 33 mph.

    High: 45 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. Wind chill values between 15 and 25. Breezy, with a west wind 18 to 20 mph, with gusts as high as 36 mph.

    Low: 30 °F

    Mostly Clear
    and Breezy

  • Friday

    Friday: Mostly sunny, with a high near 43. Breezy, with a west wind 18 to 25 mph, with gusts as high as 45 mph.

    High: 43 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 30. Breezy.

    Low: 30 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly after 4pm. Patchy fog. Otherwise, mostly cloudy, with a temperature falling to around 57 by 5pm. Southwest wind around 10 mph.
Tonight
A 30 percent chance of showers before 10pm. Patchy fog before 10pm. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 36. West wind 7 to 17 mph, with gusts as high as 33 mph.
Thanksgiving Day
Mostly sunny, with a high near 45. Breezy, with a west wind 16 to 20 mph, with gusts as high as 33 mph.
Thursday Night
Mostly clear, with a low around 30. Wind chill values between 15 and 25. Breezy, with a west wind 18 to 20 mph, with gusts as high as 36 mph.
Friday
Mostly sunny, with a high near 43. Breezy, with a west wind 18 to 25 mph, with gusts as high as 45 mph.
Friday Night
Mostly clear, with a low around 30. Breezy.
Saturday
Sunny, with a high near 43.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Mostly cloudy, with a high near 53.
Sunday Night
A 50 percent chance of rain. Cloudy, with a low around 41.
Monday
A 40 percent chance of rain. Cloudy, with a high near 51.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 33.
Tuesday
Rain likely. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
9:23 am EST Nov 26, 2025
Forecast Valid:
12pm EST Nov 26, 2025-6pm EST Dec 2, 2025
 
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Additional Resources

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