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

42°F

6°C

Humidity 65%
Wind Speed W 15 mph
Barometer 30.12 in (1019.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 1 Dec 1:56 am EST
Extended Forecast for

5 Miles SSE Blue Point NY

  • Overnight

    Overnight: Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a west wind around 25 mph.

    Low: 38 °F

    Decreasing
    Clouds and
    Breezy

  • Monday

    Monday: Sunny, with a high near 41. Breezy, with a northwest wind 14 to 22 mph.

    High: 41 °F

    Sunny and
    Breezy then
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a temperature falling to near 35 by 11pm, then rising to around 41 during the remainder of the night. North wind 6 to 10 mph becoming southeast after midnight.

    Low: 35 °F⇑

    Increasing
    Clouds

  • Tuesday

    Tuesday: Rain. High near 49. Southeast wind 10 to 18 mph becoming north in the afternoon. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.

    High: 49 °F

    Rain

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Windy, with a northwest wind 22 to 26 mph.

    Low: 34 °F

    Chance Rain
    and Windy

  • Wednesday

    Wednesday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 42. Breezy.

    High: 42 °F

    Partly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. Blustery.

    Low: 24 °F

    Partly Cloudy
    and Blustery

Detailed Forecast

Overnight
Mostly cloudy, then gradually becoming mostly clear, with a low around 38. Breezy, with a west wind around 25 mph.
Monday
Sunny, with a high near 41. Breezy, with a northwest wind 14 to 22 mph.
Monday Night
Increasing clouds, with a temperature falling to near 35 by 11pm, then rising to around 41 during the remainder of the night. North wind 6 to 10 mph becoming southeast after midnight.
Tuesday
Rain. High near 49. Southeast wind 10 to 18 mph becoming north in the afternoon. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Tuesday Night
A 50 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34. Windy, with a northwest wind 22 to 26 mph.
Wednesday
Sunny, with a high near 40.
Wednesday Night
Partly cloudy, with a low around 37.
Thursday
Partly sunny, with a high near 42. Breezy.
Thursday Night
Partly cloudy, with a low around 24. Blustery.
Friday
Mostly sunny, with a high near 39.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.
Saturday
Rain likely. Mostly cloudy, with a high near 42. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 43.
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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:
1:19 am EST Dec 1, 2025
Forecast Valid:
1am EST Dec 1, 2025-6pm EST Dec 7, 2025
 
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