National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

29°F

-2°C

Humidity 45%
Wind Speed S 14 G 22 mph
Barometer 30.46 in (1031.5 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 21 Jan 12:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 41. Wind chill values between 20 and 25. Breezy, with a south wind 15 to 22 mph.

    High: 41 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 38. Windy, with a southwest wind 23 to 26 mph.

    Low: 38 °F

    Slight Chance
    Rain and
    Windy

  • Thursday

    Thursday: Mostly sunny, with a high near 42. Breezy, with a west wind around 22 mph.

    High: 42 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. Wind chill values between 20 and 25. Breezy, with a west wind 17 to 21 mph.

    Low: 29 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35. Breezy, with a west wind 15 to 23 mph.

    High: 35 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 12. Windy.

    Low: 12 °F

    Mostly Cloudy
    and Windy

  • Saturday

    Saturday: Partly sunny and cold, with a high near 18. Blustery.

    High: 18 °F

    Partly Sunny
    and Blustery
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Snow likely after 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 60%.

    Low: 15 °F

    Mostly Cloudy
    then Snow
    Likely

  • Sunday

    Sunday: Snow. High near 28. Blustery. Chance of precipitation is 90%.

    High: 28 °F

    Snow and
    Blustery

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 41. Wind chill values between 20 and 25. Breezy, with a south wind 15 to 22 mph.
Tonight
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 38. Windy, with a southwest wind 23 to 26 mph.
Thursday
Mostly sunny, with a high near 42. Breezy, with a west wind around 22 mph.
Thursday Night
Partly cloudy, with a low around 29. Wind chill values between 20 and 25. Breezy, with a west wind 17 to 21 mph.
Friday
Partly sunny, with a high near 35. Breezy, with a west wind 15 to 23 mph.
Friday Night
Mostly cloudy, with a low around 12. Windy.
Saturday
Partly sunny and cold, with a high near 18. Blustery.
Saturday Night
Snow likely after 1am. Mostly cloudy, with a low around 15. Chance of precipitation is 60%.
Sunday
Snow. High near 28. Blustery. Chance of precipitation is 90%.
Sunday Night
Snow. Low around 23. Blustery. Chance of precipitation is 80%.
Monday
A 50 percent chance of snow. Mostly cloudy, with a high near 28. Blustery.
Monday Night
Partly cloudy, with a low around 17. Blustery.
Tuesday
Mostly sunny, with a high near 24. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
12:34 pm EST Jan 21, 2026
Forecast Valid:
1pm EST Jan 21, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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