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

42°F

6°C

Humidity 55%
Wind Speed W 14 mph
Barometer 29.85 in (1010.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 11 Nov 9:56 pm EST
Extended Forecast for

Selden NY

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Southwest wind 11 to 16 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40. West wind 10 to 13 mph.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 52. West wind 13 to 16 mph, with gusts as high as 26 mph.

    High: 52 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. West wind 9 to 14 mph.

    Low: 37 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 34. Southwest wind 11 to 16 mph, with gusts as high as 28 mph.
Wednesday
Partly sunny, with a high near 50. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 40. West wind 10 to 13 mph.
Thursday
Mostly sunny, with a high near 52. West wind 13 to 16 mph, with gusts as high as 26 mph.
Thursday Night
Mostly clear, with a low around 37. West wind 9 to 14 mph.
Friday
Mostly sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Sunny, with a high near 47.
Saturday Night
A 30 percent chance of rain after 1am. Mostly cloudy, with a low around 33.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 57.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly sunny, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Selden NY
 40.86°N 73.04°W (Elev. 115 ft)
Last Update:
1:09 pm EST Nov 11, 2025
Forecast Valid:
10pm EST Nov 11, 2025-6pm EST Nov 18, 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