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.

Light Snow Rain Fog/Mist

33°F

1°C

Humidity 96%
Wind Speed NE 8 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 32°F (0°C)
Visibility 2.00 mi
Wind Chill26°F (-3°C)
Last update 18 Jan 2:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

Winter Weather Advisory January 18, 03:30pm until January 19, 04:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory January 18, 03:30pm until January 19, 04:00am

    NOW until 4:00am Mon

    Winter Weather Advisory

  • This Afternoon

    High: 37 °F

    Rain/Snow

  • Tonight

    Tonight: Snow, mainly before 10pm. Low around 26. Wind chill values between 15 and 20. North wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    Low: 26 °F

    Snow then
    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 33. Wind chill values between 15 and 20. Windy, with a west wind 15 to 20 mph increasing to 24 to 29 mph in the afternoon.

    High: 33 °F

    Mostly Sunny
    and Windy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 20. Wind chill values between 10 and 20. Windy, with a west wind 23 to 29 mph.

    Low: 20 °F

    Partly Cloudy
    and Windy

  • Tuesday

    Tuesday: Sunny, with a high near 24. Windy, with a west wind 22 to 29 mph.

    High: 24 °F

    Sunny and
    Windy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 18. Breezy.

    Low: 18 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39. Breezy.

    High: 39 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33. Breezy.

    Low: 33 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

This Afternoon
Snow, possibly mixed with rain. High near 37. Northeast wind around 10 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tonight
Snow, mainly before 10pm. Low around 26. Wind chill values between 15 and 20. North wind 10 to 15 mph becoming west after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
M.L.King Day
Mostly sunny, with a high near 33. Wind chill values between 15 and 20. Windy, with a west wind 15 to 20 mph increasing to 24 to 29 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 20. Wind chill values between 10 and 20. Windy, with a west wind 23 to 29 mph.
Tuesday
Sunny, with a high near 24. Windy, with a west wind 22 to 29 mph.
Tuesday Night
Mostly clear, with a low around 18. Breezy.
Wednesday
Mostly sunny, with a high near 39. Breezy.
Wednesday Night
Mostly cloudy, with a low around 33. Breezy.
Thursday
Partly sunny, with a high near 37. Breezy.
Thursday Night
Partly cloudy, with a low around 24. Breezy.
Friday
Mostly sunny, with a high near 36.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 37. Chance of precipitation is 30%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 40%.
Sunday
A chance of snow. Partly sunny, with a high near 29. Blustery.
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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:
10:00 am EST Jan 18, 2026
Forecast Valid:
3pm EST Jan 18, 2026-6pm EST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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