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

Flash Flood Watches in Southeast and Tennessee Valley; Critical Fire Weather in California; Severe Weather in Upper Midwest

Flash flood watches are in effect today in parts of the Southeast and Tennessee Valley from organized areas of heavy to excessive rainfall. Meanwhile, critical fire weather conditions are likely across northern California with offshore winds and dry conditions. Finally, a strong cold front will produce severe thunderstorms across the Upper to Mid Mississippi Valley. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

71°F

22°C

Humidity 55%
Wind Speed SE 10 mph
Barometer 30.35 in (1027.7 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 Sep 4:56 pm EDT
Extended Forecast for

Sayville NY

  • Tonight

    Tonight: Mostly clear, with a low around 61. Southeast wind 7 to 10 mph.

    Mostly Clear

    Low: 61 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 74. East wind 6 to 11 mph.

    Partly Sunny

    High: 74 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers after 9pm. Mostly cloudy, with a low around 68. East wind around 9 mph.

    Slight Chance
    Showers

    Low: 68 °F

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly between 9am and 3pm. Mostly cloudy, with a high near 77. South wind 9 to 15 mph.

    Chance
    Showers

    High: 77 °F

  • Wednesday
    Night

    Wednesday Night: A 40 percent chance of showers, mainly after 3am. Mostly cloudy, with a low around 68. Southeast wind around 14 mph.

    Chance
    Showers

    Low: 68 °F

  • Thursday

    Thursday: A 40 percent chance of showers. Partly sunny, with a steady temperature around 72.

    Chance
    Showers

    High: 72 °F

  • Thursday
    Night

    Thursday Night: Showers likely, mainly between 9pm and 3am, then rain likely after 3am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.

    Showers
    Likely

    Low: 63 °F

  • Friday

    Friday: Rain likely before 9am, then a chance of showers after 9am. Partly sunny, with a high near 73. Chance of precipitation is 70%.

    Rain Likely
    then Chance
    Showers

    High: 73 °F

  • Friday
    Night

    Friday Night: A 30 percent chance of showers before 9pm. Partly cloudy, with a low around 61.

    Chance
    Showers then
    Partly Cloudy

    Low: 61 °F

Detailed Forecast

Tonight
Mostly clear, with a low around 61. Southeast wind 7 to 10 mph.
Tuesday
Partly sunny, with a high near 74. East wind 6 to 11 mph.
Tuesday Night
A 20 percent chance of showers after 9pm. Mostly cloudy, with a low around 68. East wind around 9 mph.
Wednesday
A 30 percent chance of showers, mainly between 9am and 3pm. Mostly cloudy, with a high near 77. South wind 9 to 15 mph.
Wednesday Night
A 40 percent chance of showers, mainly after 3am. Mostly cloudy, with a low around 68. Southeast wind around 14 mph.
Thursday
A 40 percent chance of showers. Partly sunny, with a steady temperature around 72.
Thursday Night
Showers likely, mainly between 9pm and 3am, then rain likely after 3am. Mostly cloudy, with a low around 63. Chance of precipitation is 70%.
Friday
Rain likely before 9am, then a chance of showers after 9am. Partly sunny, with a high near 73. Chance of precipitation is 70%.
Friday Night
A 30 percent chance of showers before 9pm. Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 60.
Monday
Sunny, with a high near 72.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Sayville NY
 40.73°N 73.07°W (Elev. 16 ft)
Last Update:
3:41 pm EDT Sep 20, 2021
Forecast Valid:
5pm EDT Sep 20, 2021-6pm EDT Sep 27, 2021
 
Forecast Discussion
 
Get as KML Get as XML

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