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.

Light Rain Fog/Mist

59°F

15°C

Humidity 96%
Wind Speed SE 6 mph
Barometer 29.87 in (1011.5 mb)
Dewpoint 58°F (14°C)
Visibility 6.00 mi
Last update 15 May 10:56 am EDT
Extended Forecast for

Smithtown NY

  • Today

    Today: Rain. High near 64. East wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Rain

  • Tonight

    Tonight: Rain. Low around 55. Northeast wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 55 °F

    Rain

  • Thursday

    Thursday: Rain likely and possibly a thunderstorm before 2pm, then a chance of rain. Cloudy, with a high near 63. Northeast wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 55. Northeast wind 9 to 13 mph.

    Low: 55 °F

    Chance Rain

  • Friday

    Friday: Partly sunny, with a high near 71. East wind around 9 mph.

    High: 71 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 8pm. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers. Mostly cloudy, with a high near 63.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

Today
Rain. High near 64. East wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain. Low around 55. Northeast wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Rain likely and possibly a thunderstorm before 2pm, then a chance of rain. Cloudy, with a high near 63. Northeast wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 55. Northeast wind 9 to 13 mph.
Friday
Partly sunny, with a high near 71. East wind around 9 mph.
Friday Night
Mostly cloudy, with a low around 53.
Saturday
Mostly cloudy, with a high near 65.
Saturday Night
A 40 percent chance of showers after 8pm. Mostly cloudy, with a low around 52.
Sunday
A 30 percent chance of showers. Mostly cloudy, with a high near 63.
Sunday Night
Mostly cloudy, with a low around 51.
Monday
Partly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Smithtown NY
 40.86°N 73.22°W (Elev. 82 ft)
Last Update:
9:44 am EDT May 15, 2024
Forecast Valid:
11am EDT May 15, 2024-6pm EDT May 21, 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