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.

Mostly Cloudy

37°F

3°C

Humidity 73%
Wind Speed S 14 mph
Barometer 29.65 in (1004.2 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 25 Feb 1:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 39. Breezy, with a southwest wind 20 to 22 mph.

    High: 39 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Partly cloudy, with a low around 32. Southwest wind 14 to 18 mph.

    Low: 32 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow after 1pm. Partly sunny, with a high near 36. Wind chill values between 25 and 30. Northwest wind 6 to 11 mph.

    High: 36 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. West wind around 7 mph becoming north after midnight.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 37. Northeast wind around 6 mph becoming south in the afternoon.

    High: 37 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 36.

    High: 36 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 39. Breezy, with a southwest wind 20 to 22 mph.
Tonight
Partly cloudy, with a low around 32. Southwest wind 14 to 18 mph.
Thursday
A 20 percent chance of snow after 1pm. Partly sunny, with a high near 36. Wind chill values between 25 and 30. Northwest wind 6 to 11 mph.
Thursday Night
Mostly clear, with a low around 27. West wind around 7 mph becoming north after midnight.
Friday
Sunny, with a high near 37. Northeast wind around 6 mph becoming south in the afternoon.
Friday Night
Mostly clear, with a low around 33.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly cloudy, with a high near 36.
Sunday Night
Partly cloudy, with a low around 21.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 29.
Monday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 22.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 36. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
12:43 pm EST Feb 25, 2026
Forecast Valid:
2pm EST Feb 25, 2026-6pm EST Mar 3, 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