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

63°F

17°C

Humidity 97%
Wind Speed NW 6 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 24 Jun 1:56 am EDT
Extended Forecast for

Selden NY

  • Overnight

    Overnight: Partly cloudy, with a low around 63. North wind 6 to 8 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 85. Northwest wind around 9 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Mostly cloudy, with a low around 66. South wind around 8 mph. Chance of precipitation is 60%.

    Low: 66 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 63. North wind 6 to 8 mph.
Wednesday
Sunny, with a high near 85. Northwest wind around 9 mph.
Wednesday Night
Mostly clear, with a low around 63. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Calm wind becoming south 5 to 9 mph in the afternoon.
Thursday Night
A slight chance of showers before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then showers likely after 5am. Mostly cloudy, with a low around 66. South wind around 8 mph. Chance of precipitation is 60%.
Friday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Saturday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.
Saturday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
Mostly clear, with a low around 66.
Monday
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 85.
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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:
2:20 pm EDT Jun 23, 2026
Forecast Valid:
2am EDT Jun 24, 2026-6pm EDT Jun 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