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Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Light Rain Fog/Mist

62°F

17°C

Humidity 93%
Wind Speed NE 15 G 25 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 60°F (16°C)
Visibility 6.00 mi
Last update 20 Aug 7:56 pm EDT
Extended Forecast for

Setauket-East Setauket NY

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

  • Tonight

    Tonight: Rain and possibly a thunderstorm, mainly before 2am, then a chance of rain and thunderstorms after 2am. Low around 62. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 62 °F

    Rain

  • Thursday

    Thursday: A chance of rain before 8am, then a chance of showers between 8am and 11am. Mostly cloudy, with a high near 74. Breezy, with a northeast wind 16 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance Rain
    then Mostly
    Cloudy and
    Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 16 to 18 mph, with gusts as high as 29 mph.

    Low: 60 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 83. North wind 9 to 14 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65. West wind around 6 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 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • 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

Tonight
Rain and possibly a thunderstorm, mainly before 2am, then a chance of rain and thunderstorms after 2am. Low around 62. Northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A chance of rain before 8am, then a chance of showers between 8am and 11am. Mostly cloudy, with a high near 74. Breezy, with a northeast wind 16 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 60. North wind 16 to 18 mph, with gusts as high as 29 mph.
Friday
Sunny, with a high near 83. North wind 9 to 14 mph.
Friday Night
Mostly clear, with a low around 65. West wind around 6 mph.
Saturday
Sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 68.
Sunday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.
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 80.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Setauket-East Setauket NY
 40.91°N 73.09°W (Elev. 197 ft)
Last Update:
6:19 pm EDT Aug 20, 2025
Forecast Valid:
8pm EDT Aug 20, 2025-6pm EDT Aug 27, 2025
 
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