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

60°F

16°C

Humidity 44%
Wind Speed N 7 mph
Barometer 30.04 in (1017.2 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 18 Oct 9:56 am EDT
Extended Forecast for

Selden NY

  • Today

    Today: Sunny, with a high near 64. North wind around 5 mph becoming south in the afternoon.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 48. Light south wind.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 70. South wind 5 to 15 mph, with gusts as high as 26 mph.

    High: 70 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers likely, then showers and possibly a thunderstorm after 5am. Low around 57. South wind 13 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 11am, then a chance of showers. High near 68. Breezy, with a southeast wind 17 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Breezy.
    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 40 percent chance of showers before 2pm. Mostly sunny, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 64. North wind around 5 mph becoming south in the afternoon.
Tonight
Mostly clear, with a low around 48. Light south wind.
Sunday
Mostly sunny, with a high near 70. South wind 5 to 15 mph, with gusts as high as 26 mph.
Sunday Night
Showers likely, then showers and possibly a thunderstorm after 5am. Low around 57. South wind 13 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm before 11am, then a chance of showers. High near 68. Breezy, with a southeast wind 17 to 21 mph becoming southwest in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Sunny, with a high near 67.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 52.
Wednesday
A 40 percent chance of showers before 2pm. Mostly sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Selden NY
 40.86°N 73.04°W (Elev. 115 ft)
Last Update:
7:17 am EDT Oct 18, 2025
Forecast Valid:
10am EDT Oct 18, 2025-6pm EDT Oct 24, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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