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.

Overcast

67°F

19°C

Humidity 84%
Wind Speed NE 6 mph
Barometer 30.04 in (1017.1 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 27 Sep 8:56 am EDT
Extended Forecast for

Smithtown NY

  • Today

    Today: A 30 percent chance of showers before 10am. Cloudy, with a high near 74. Northeast wind around 6 mph.

    High: 74 °F

    Chance
    Showers then
    Cloudy

  • Tonight

    Tonight: A 40 percent chance of showers, mainly after 2am. Cloudy, with a low around 62. Calm wind becoming east around 5 mph after midnight.

    Low: 62 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly cloudy, with a high near 72. East wind 10 to 13 mph.

    High: 72 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Cloudy, with a low around 58. East wind around 10 mph.

    Low: 58 °F

    Chance
    Showers

  • Sunday

    Sunday: A 20 percent chance of showers before 2pm. Mostly cloudy, with a high near 69. East wind around 11 mph.

    High: 69 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Partly sunny, with a high near 70.

    High: 70 °F

    Chance
    Showers

Detailed Forecast

Today
A 30 percent chance of showers before 10am. Cloudy, with a high near 74. Northeast wind around 6 mph.
Tonight
A 40 percent chance of showers, mainly after 2am. Cloudy, with a low around 62. Calm wind becoming east around 5 mph after midnight.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 72. East wind 10 to 13 mph.
Saturday Night
A 30 percent chance of showers. Cloudy, with a low around 58. East wind around 10 mph.
Sunday
A 20 percent chance of showers before 2pm. Mostly cloudy, with a high near 69. East wind around 11 mph.
Sunday Night
Mostly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 71.
Monday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 57.
Tuesday
A 50 percent chance of showers. Partly sunny, with a high near 70.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 57.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 71.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 70.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Smithtown NY
 40.86°N 73.19°W (Elev. 98 ft)
Last Update:
9:37 am EDT Sep 27, 2024
Forecast Valid:
9am EDT Sep 27, 2024-6pm EDT Oct 3, 2024
 
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