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

57°F

14°C

Humidity 96%
Wind Speed N 14 mph
Barometer 29.80 in (1009.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 11 Oct 10:56 pm EDT
Extended Forecast for

Terryville NY

  • Tonight

    Tonight: Rain likely and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms after midnight. Cloudy, with a low around 55. Northeast wind 13 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Rain Likely

  • Columbus Day

    Columbus Day: Cloudy through mid morning, then gradual clearing, with a high near 69. North wind 7 to 13 mph.

    High: 69 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 61. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Rain likely and possibly a thunderstorm before midnight, then a chance of rain and thunderstorms after midnight. Cloudy, with a low around 55. Northeast wind 13 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Columbus Day
Cloudy through mid morning, then gradual clearing, with a high near 69. North wind 7 to 13 mph.
Monday Night
Mostly clear, with a low around 56. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 68. Light and variable wind becoming south 5 to 9 mph in the morning.
Tuesday Night
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 61. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 50.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 47. Breezy.
Saturday
Partly sunny, with a high near 56. Breezy.
Saturday Night
Mostly cloudy, with a low around 39. Breezy.
Sunday
Mostly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Terryville NY
 40.91°N 73.06°W (Elev. 154 ft)
Last Update:
3:33 pm EDT Oct 11, 2026
Forecast Valid:
11pm EDT Oct 11, 2026-6pm EDT Oct 18, 2026
 
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