Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.
National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms in the Central U.S.; Hot from California to the Carolinas

Severe thunderstorms impacting the Central U.S. today will primarily produce damaging winds, including some significant damage potential, and large to very large hail. Locally heavy rain with these storms may reach excessive levels, with potential for flash flooding. Summer remains firmly entrenched from interior California to the Carolinas with many Heat Advisories in effect. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

75°F

24°C

Humidity 79%
Wind Speed S 8 mph
Barometer 29.84 in (1010.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 24 Jun 11:56 am EDT
Extended Forecast for

West Sayville NY

  • This
    Afternoon

    This Afternoon: Mostly cloudy, with a high near 78. South wind 8 to 13 mph.

    Mostly Cloudy

    High: 78 °F

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Patchy fog between 9pm and midnight. Otherwise, mostly cloudy, with a low around 66. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 50%.

    Chance
    Showers and
    Patchy Fog
    then Slight
    Chance
    Showers

    Low: 66 °F

  • Monday

    Monday: Mostly sunny, with a high near 79. North wind around 14 mph.

    Mostly Sunny

    High: 79 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 58. Northeast wind 5 to 11 mph.

    Mostly Clear

    Low: 58 °F

  • Tuesday

    Tuesday: Sunny, with a high near 73. Light and variable wind becoming south 5 to 7 mph in the morning.

    Sunny

    High: 73 °F

  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 62.

    Mostly Clear

    Low: 62 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75.

    Mostly Sunny

    High: 75 °F

  • Wednesday
    Night

    Wednesday Night: Mostly cloudy, with a low around 67.

    Mostly Cloudy

    Low: 67 °F

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.

    Chance
    T-storms

    High: 81 °F

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 78. South wind 8 to 13 mph.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Patchy fog between 9pm and midnight. Otherwise, mostly cloudy, with a low around 66. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 79. North wind around 14 mph.
Monday Night
Mostly clear, with a low around 58. Northeast wind 5 to 11 mph.
Tuesday
Sunny, with a high near 73. Light and variable wind becoming south 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 75.
Wednesday Night
Mostly cloudy, with a low around 67.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Thursday Night
Mostly cloudy, with a low around 70.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 73.
Saturday
Mostly sunny, with a high near 85.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
West Sayville NY
 40.74°N 73.1°W (Elev. 30 ft)
Last Update:
6:21 am EDT Jun 24, 2018
Forecast Valid:
12pm EDT Jun 24, 2018-6pm EDT Jun 30, 2018
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic 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