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

47°F

8°C

Humidity 61%
Wind Speed S 10 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 28 Feb 1:56 pm EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 43. Light and variable wind becoming southwest around 6 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Patchy fog between midnight and 2am. Otherwise, increasing clouds, with a low around 28. Wind chill values between 20 and 25. Light and variable wind becoming north 5 to 9 mph after midnight.

    Low: 28 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Snow likely, mainly before 1pm. Mostly cloudy, with a high near 35. Wind chill values between 20 and 25. North wind 10 to 14 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Snow Likely

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 16. Wind chill values between zero and 10. North wind around 18 mph.

    Low: 16 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 28. North wind 5 to 15 mph.

    High: 28 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of rain and snow before 10am, then rain likely. Mostly cloudy, with a high near 41. Chance of precipitation is 70%.

    High: 41 °F

    Chance
    Rain/Snow
    then Rain
    Likely

  • Tuesday Night

    Tuesday Night: Rain. Low around 38. Chance of precipitation is 90%.

    Low: 38 °F

    Rain

  • Wednesday

    Wednesday: Cloudy, with a high near 43.

    High: 43 °F

    Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 43. Light and variable wind becoming southwest around 6 mph.
Tonight
Patchy fog between midnight and 2am. Otherwise, increasing clouds, with a low around 28. Wind chill values between 20 and 25. Light and variable wind becoming north 5 to 9 mph after midnight.
Sunday
Snow likely, mainly before 1pm. Mostly cloudy, with a high near 35. Wind chill values between 20 and 25. North wind 10 to 14 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly clear, with a low around 16. Wind chill values between zero and 10. North wind around 18 mph.
Monday
Sunny, with a high near 28. North wind 5 to 15 mph.
Monday Night
Mostly clear, with a low around 21.
Tuesday
A chance of rain and snow before 10am, then rain likely. Mostly cloudy, with a high near 41. Chance of precipitation is 70%.
Tuesday Night
Rain. Low around 38. Chance of precipitation is 90%.
Wednesday
Cloudy, with a high near 43.
Wednesday Night
A 40 percent chance of rain. Cloudy, with a low around 37.
Thursday
A 40 percent chance of rain. Cloudy, with a high near 45.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Friday
A 40 percent chance of rain. Cloudy, with a high near 44.
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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:
1:49 pm EST Feb 28, 2026
Forecast Valid:
2pm EST Feb 28, 2026-6pm EST Mar 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation