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.

Fog/Mist

56°F

13°C

Humidity 93%
Wind Speed SW 9 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 54°F (12°C)
Visibility 1.00 mi
Last update 26 Nov 5:56 am EST
Extended Forecast for

Nesconset NY

  • Today

    Today: A 50 percent chance of showers, mainly after 4pm. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, cloudy, with a high near 60. Southwest wind 5 to 9 mph.

    High: 60 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: A 30 percent chance of showers before 10pm. Patchy fog before 10pm. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 35. West wind 6 to 15 mph, with gusts as high as 31 mph.

    Low: 35 °F

    Chance
    Showers and
    Patchy Fog
    then Partly
    Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly sunny, with a high near 45. West wind 15 to 18 mph, with gusts as high as 33 mph.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. Wind chill values between 20 and 30. West wind 15 to 17 mph, with gusts as high as 33 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 42. Breezy, with a west wind 17 to 24 mph, with gusts as high as 44 mph.

    High: 42 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, with a high near 52.

    High: 52 °F

    Cloudy

Detailed Forecast

Today
A 50 percent chance of showers, mainly after 4pm. Patchy fog before 1pm, then patchy fog after 4pm. Otherwise, cloudy, with a high near 60. Southwest wind 5 to 9 mph.
Tonight
A 30 percent chance of showers before 10pm. Patchy fog before 10pm. Otherwise, cloudy during the early evening, then gradual clearing, with a low around 35. West wind 6 to 15 mph, with gusts as high as 31 mph.
Thanksgiving Day
Mostly sunny, with a high near 45. West wind 15 to 18 mph, with gusts as high as 33 mph.
Thursday Night
Mostly clear, with a low around 30. Wind chill values between 20 and 30. West wind 15 to 17 mph, with gusts as high as 33 mph.
Friday
Mostly sunny, with a high near 42. Breezy, with a west wind 17 to 24 mph, with gusts as high as 44 mph.
Friday Night
Mostly clear, with a low around 30.
Saturday
Sunny, with a high near 42.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Cloudy, with a high near 52.
Sunday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Monday
A 40 percent chance of rain. Cloudy, with a high near 51.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 32.
Tuesday
Rain likely. Mostly cloudy, with a high near 43. Chance of precipitation is 60%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Nesconset NY
 40.86°N 73.16°W (Elev. 98 ft)
Last Update:
1:00 am EST Nov 26, 2025
Forecast Valid:
6am EST Nov 26, 2025-6pm EST Dec 2, 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