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

79°F

26°C

Humidity 39%
Wind Speed W 15 G 22 mph
Barometer 29.65 in (1003.8 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 Jun 2:56 pm EDT
Extended Forecast for

Selden NY

  • Tonight

    Tonight: Mostly clear, with a low around 64. West wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84. West wind around 18 mph, with gusts as high as 30 mph.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63. West wind 5 to 9 mph becoming light northwest after midnight.

    Low: 63 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 84. Southwest wind 5 to 10 mph.

    High: 84 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 65. West wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Cloudy

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 77 °F

    Showers

  • Monday Night

    Monday Night: Showers, mainly before 2am. Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 64. West wind 9 to 14 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 84. West wind around 18 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 63. West wind 5 to 9 mph becoming light northwest after midnight.
Sunday
Increasing clouds, with a high near 84. Southwest wind 5 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 65. West wind around 5 mph becoming calm in the evening.
Monday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers, mainly before 2am. Low around 67. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 83.
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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:
2:35 pm EDT Jun 19, 2026
Forecast Valid:
3pm EDT Jun 19, 2026-6pm EDT Jun 26, 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