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.

A Few Clouds

24°F

-4°C

Humidity 40%
Wind Speed NW 15 G 24 mph
Barometer 30.19 in (1022.4 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 9 Feb 12:56 pm EST
Extended Forecast for

Islip Terrace NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 27. Wind chill values between 15 and 20. Northwest wind 8 to 11 mph.

    High: 27 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow after 4pm. Mostly cloudy, with a high near 37. Wind chill values between 20 and 30. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before 4am, then a slight chance of snow. Cloudy, then gradually becoming partly cloudy, with a low around 28. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 50%.

    Low: 28 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. West wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 27. Wind chill values between 15 and 20. Northwest wind 8 to 11 mph.
Tonight
Mostly cloudy, with a low around 16. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of rain and snow after 4pm. Mostly cloudy, with a high near 37. Wind chill values between 20 and 30. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.
Tuesday Night
A chance of rain and snow before 4am, then a slight chance of snow. Cloudy, then gradually becoming partly cloudy, with a low around 28. Calm wind becoming west around 5 mph after midnight. Chance of precipitation is 50%.
Wednesday
Mostly sunny, with a high near 38. West wind 6 to 13 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Mostly sunny, with a high near 33.
Friday Night
Mostly clear, with a low around 21.
Saturday
Sunny, with a high near 35.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
1:12 pm EST Feb 9, 2026
Forecast Valid:
1pm EST Feb 9, 2026-6pm EST Feb 15, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation