National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

63°F

17°C

Humidity 93%
Wind Speed NE 10 mph
Barometer 29.97 in (1015.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Aug 4:56 am EDT
Extended Forecast for

Terryville NY

Coastal Flood Advisory August 21, 08:00pm until August 22, 01:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Overnight

    Overnight: A 30 percent chance of showers. Cloudy, with a steady temperature around 63. Northeast wind around 17 mph, with gusts as high as 29 mph.

    Low: 63 °F

    Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 8am. Cloudy, with a high near 73. Breezy, with a northeast wind 16 to 20 mph, with gusts as high as 30 mph.

    High: 73 °F

    Breezy.
    Chance
    Showers then
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Breezy, with a north wind 16 to 20 mph, with gusts as high as 30 mph.

    Low: 60 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 83. North wind 8 to 15 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. Southwest wind 3 to 5 mph.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 30 percent chance of showers. Cloudy, with a steady temperature around 63. Northeast wind around 17 mph, with gusts as high as 29 mph.
Thursday
A 30 percent chance of showers, mainly before 8am. Cloudy, with a high near 73. Breezy, with a northeast wind 16 to 20 mph, with gusts as high as 30 mph.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 60. Breezy, with a north wind 16 to 20 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 83. North wind 8 to 15 mph.
Friday Night
Mostly clear, with a low around 65. Southwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Monday
Showers likely, mainly before 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 79.
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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:
1:51 am EDT Aug 21, 2025
Forecast Valid:
5am EDT Aug 21, 2025-6pm EDT Aug 27, 2025
 
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