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.

Mostly Cloudy

40°F

4°C

Humidity 25%
Wind Speed N 9 mph
Barometer 30.40 in (1029.4 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 28 Mar 4:56 pm EDT
Extended Forecast for

5 Miles SSE Blue Point NY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 34. North wind 6 to 14 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 44. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon.

    High: 44 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 42. Breezy, with a southwest wind 21 to 25 mph.

    Low: 42 °F

    Increasing
    Clouds and
    Breezy

  • Monday

    Monday: Mostly cloudy, with a high near 50. Breezy, with a southwest wind around 21 mph.

    High: 50 °F

    Mostly Cloudy
    and Breezy

  • Monday Night

    Monday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southwest wind 15 to 17 mph.

    Low: 46 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 48. Windy.

    Low: 48 °F

    Partly Cloudy
    and Windy

  • Wednesday

    Wednesday: A 40 percent chance of rain after 2pm. Partly sunny, with a high near 54. Windy.

    High: 54 °F

    Partly Sunny
    and Windy
    then Chance
    Rain and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 8pm. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 70%.

    Low: 40 °F

    Rain Likely
    and Breezy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 34. North wind 6 to 14 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 44. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 42. Breezy, with a southwest wind 21 to 25 mph.
Monday
Mostly cloudy, with a high near 50. Breezy, with a southwest wind around 21 mph.
Monday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 46. Southwest wind 15 to 17 mph.
Tuesday
Partly sunny, with a high near 54. Breezy.
Tuesday Night
Partly cloudy, with a low around 48. Windy.
Wednesday
A 40 percent chance of rain after 2pm. Partly sunny, with a high near 54. Windy.
Wednesday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain. Cloudy, with a high near 44. Breezy.
Thursday Night
Rain and snow likely. Cloudy, with a low around 38. Windy. Chance of precipitation is 60%.
Friday
Rain and snow likely. Cloudy, with a high near 43. Windy. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 39. Windy. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Cloudy, with a high near 45. Breezy.
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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:
2:35 pm EDT Mar 28, 2026
Forecast Valid:
5pm EDT Mar 28, 2026-6pm EDT Apr 4, 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