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.

Fair

33°F

1°C

Humidity 54%
Wind Speed NW 15 G 28 mph
Barometer 30.02 in (1016.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 13 Mar 2:56 am EDT
Extended Forecast for

Terryville NY

  • Overnight

    Overnight: Clear, with a low around 29. Wind chill values between 20 and 25. West wind around 14 mph.

    Low: 29 °F

    Clear

  • Friday

    Friday: Increasing clouds, with a high near 46. Wind chill values between 20 and 30 early. West wind 5 to 11 mph becoming south in the afternoon.

    High: 46 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Southwest wind 14 to 17 mph.

    Low: 37 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 47. Breezy, with a west wind 16 to 24 mph.

    High: 47 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 31. Northwest wind 5 to 13 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 50 percent chance of rain after 2am. Cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Rain

  • Monday

    Monday: Rain, with thunderstorms also possible after 8am. High near 57. Breezy. Chance of precipitation is 100%.

    High: 57 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Rain. Low around 38. Windy. Chance of precipitation is 90%.

    Low: 38 °F

    Rain and
    Windy

Detailed Forecast

Overnight
Clear, with a low around 29. Wind chill values between 20 and 25. West wind around 14 mph.
Friday
Increasing clouds, with a high near 46. Wind chill values between 20 and 30 early. West wind 5 to 11 mph becoming south in the afternoon.
Friday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. Southwest wind 14 to 17 mph.
Saturday
Sunny, with a high near 47. Breezy, with a west wind 16 to 24 mph.
Saturday Night
Increasing clouds, with a low around 31. Northwest wind 5 to 13 mph.
Sunday
Mostly cloudy, with a high near 47.
Sunday Night
A 50 percent chance of rain after 2am. Cloudy, with a low around 39.
Monday
Rain, with thunderstorms also possible after 8am. High near 57. Breezy. Chance of precipitation is 100%.
Monday Night
Rain. Low around 38. Windy. Chance of precipitation is 90%.
Tuesday
Rain likely before 8am. Mostly sunny, with a high near 46. Chance of precipitation is 60%.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Sunny, with a high near 39.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Terryville NY
 40.91°N 73.06°W (Elev. 154 ft)
Last Update:
3:05 am EDT Mar 13, 2026
Forecast Valid:
3am EDT Mar 13, 2026-6pm EDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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