Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

40°F

4°C

Humidity 53%
Wind Speed S 7 mph
Barometer 29.84 in (1010.7 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 26 Feb 3:56 pm EST
Extended Forecast for

Islip NY

  • This Afternoon

    This Afternoon: A slight chance of rain and snow showers.  Cloudy, with a high near 38. Calm wind.  Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Rain/Snow

  • Tonight

    Tonight: Cloudy during the early evening, then gradual clearing, with a low around 24. Calm wind.

    Low: 24 °F

    Gradual
    Clearing

  • Friday

    Friday: Sunny, with a high near 39. Wind chill values between 25 and 35. Calm wind becoming south around 5 mph.

    High: 39 °F

    Sunny

  • Friday Night

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

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 45. South wind 3 to 6 mph.

    High: 45 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of snow after 1pm.  Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

This Afternoon
A slight chance of rain and snow showers. Cloudy, with a high near 38. Calm wind. Chance of precipitation is 20%.
Tonight
Cloudy during the early evening, then gradual clearing, with a low around 24. Calm wind.
Friday
Sunny, with a high near 39. Wind chill values between 25 and 35. Calm wind becoming south around 5 mph.
Friday Night
Mostly clear, with a low around 30. Calm wind.
Saturday
Mostly sunny, with a high near 45. South wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 37.
Sunday Night
Partly cloudy, with a low around 18.
Monday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 29.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 50%.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 44.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 31.
Thursday
A chance of rain. Mostly cloudy, with a high near 45.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
12:59 pm EST Feb 26, 2026
4pm EST Feb 26, 2026-6pm EST Mar 5, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database