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.

Fair

28°F

-2°C

Humidity 88%
Wind Speed Calm
Barometer 30.13 in (1020.4 mb)
Dewpoint 25°F (-4°C)
Visibility 9.00 mi
Last update 28 Feb 12:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly clear, with a low around 33. Southeast wind around 8 mph.

    Low: 33 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 41. South wind around 8 mph.

    High: 41 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Patchy fog between 8pm and 1am. Otherwise, partly cloudy, with a low around 30. Wind chill values between 25 and 30. Light and variable wind becoming north 6 to 11 mph in the evening.

    Low: 30 °F

    Patchy Fog

  • Sunday

    Sunday: Snow likely, mainly between 10am and 4pm. Increasing clouds, with a steady temperature around 33. Wind chill values between 20 and 25. North wind 10 to 13 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before 7pm. Mostly clear, with a low around 18. North wind 16 to 18 mph.

    Low: 18 °F

    Chance Snow
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 27.

    High: 27 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Low around 37. Breezy. Chance of precipitation is 90%.

    Low: 37 °F

    Rain and
    Breezy

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 33. Southeast wind around 8 mph.
Saturday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 41. South wind around 8 mph.
Saturday Night
Patchy fog between 8pm and 1am. Otherwise, partly cloudy, with a low around 30. Wind chill values between 25 and 30. Light and variable wind becoming north 6 to 11 mph in the evening.
Sunday
Snow likely, mainly between 10am and 4pm. Increasing clouds, with a steady temperature around 33. Wind chill values between 20 and 25. North wind 10 to 13 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
A 30 percent chance of snow before 7pm. Mostly clear, with a low around 18. North wind 16 to 18 mph.
Monday
Sunny, with a high near 27.
Monday Night
Mostly clear, with a low around 23.
Tuesday
A 50 percent chance of rain after 1pm. Mostly cloudy, with a high near 40.
Tuesday Night
Rain. Low around 37. Breezy. Chance of precipitation is 90%.
Wednesday
A 40 percent chance of rain before 1pm. Mostly cloudy, with a high near 43.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 43.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Friday
A 30 percent chance of rain. Cloudy, with a high near 45.
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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:
12:55 am EST Feb 28, 2026
Forecast Valid:
1am EST Feb 28, 2026-6pm EST Mar 6, 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