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

41°F

5°C

Humidity 38%
Wind Speed N 13 G 23 mph
Barometer 30.38 in (1028.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 24 Mar 10:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Today

    Today: Sunny, with a high near 42. North wind 8 to 18 mph, with gusts as high as 29 mph.

    High: 42 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 35. Southwest wind 11 to 15 mph.

    Low: 35 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 44. Southwest wind 9 to 13 mph.

    High: 44 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 41. South wind 11 to 14 mph.

    Low: 41 °F

    Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 49. Breezy, with a southwest wind 14 to 20 mph.

    High: 49 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 45. Breezy. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Breezy.
    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 48. Chance of precipitation is 60%.

    High: 48 °F

    Rain Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29. Blustery.

    Low: 29 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Blustery

  • Saturday

    Saturday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 42. North wind 8 to 18 mph, with gusts as high as 29 mph.
Tonight
Increasing clouds, with a low around 35. Southwest wind 11 to 15 mph.
Wednesday
Partly sunny, with a high near 44. Southwest wind 9 to 13 mph.
Wednesday Night
Cloudy, with a low around 41. South wind 11 to 14 mph.
Thursday
Mostly cloudy, with a high near 49. Breezy, with a southwest wind 14 to 20 mph.
Thursday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 45. Breezy. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain likely, mainly before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 48. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 29. Blustery.
Saturday
Sunny, with a high near 39.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Partly sunny, with a high near 48.
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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:
10:58 am EDT Mar 24, 2026
Forecast Valid:
11am EDT Mar 24, 2026-6pm EDT Mar 30, 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