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

56°F

13°C

Humidity 90%
Wind Speed NE 8 mph
Barometer 30.27 in (1025.1 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 4 Oct 4:56 am EDT
Extended Forecast for

Selden NY

  • Today

    Today: Showers likely, mainly after 5pm. Increasing clouds, with a high near 63. East wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Partly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Mostly cloudy, with a low around 55. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 55 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Monday

    Monday: Mostly cloudy through mid morning, then gradual clearing, with a high near 67. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.

    High: 67 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 47. Northwest wind 11 to 14 mph.

    Low: 47 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 60. West wind around 10 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Showers likely, mainly after 5pm. Increasing clouds, with a high near 63. East wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly before 11pm. Mostly cloudy, with a low around 55. Northeast wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly cloudy through mid morning, then gradual clearing, with a high near 67. West wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon.
Monday Night
Clear, with a low around 47. Northwest wind 11 to 14 mph.
Tuesday
Sunny, with a high near 60. West wind around 10 mph.
Tuesday Night
Clear, with a low around 46.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Sunny, with a high near 69.
Thursday Night
Mostly clear, with a low around 55.
Friday
Sunny, with a high near 67.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Selden NY
 40.86°N 73.04°W (Elev. 115 ft)
Last Update:
2:09 am EDT Oct 4, 2026
Forecast Valid:
5am EDT Oct 4, 2026-6pm EDT Oct 10, 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