Dangerously Excessive Heat and Humidity Continues from the Midwest and Eastward

Oppressive heat and humidity will continue through Saturday from the Midwest to the East Coast. The Midwest will get a slight reprieve on Sunday as a cold front moves through the area, while excessive heat continues in the East. In addition, strong to severe storms will bring potential for damaging winds, hail, and heavy rain on Saturday. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

32°C

90°F

Humidity 62%
Wind Speed NW 13 km/h
Barometer 1010.6 mb (29.85 in)
Dewpoint 24°C (75°F)
Visibility 16 km
Heat Index38°C (101°F)
Last update 20 Jul 9:56 am EDT
Extended Forecast for

West Sayville NY

Excessive Heat Warning until July 21, 08:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 21, 08:00pm

    NOW until
    8:00pm Sun

    Excessive Heat Warning

  • Today

    Today: A 20 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 34. Heat index values as high as 41. Southwest wind 11 to 21 km/h.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 34 °C

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 26. West wind 11 to 16 km/h.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 26 °C

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 34. Heat index values as high as 41. West wind 11 to 18 km/h.

    Mostly Sunny
    then Chance
    T-storms

    High: 34 °C

  • Sunday
    Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 3am.  Mostly cloudy, with a low around 24. West wind 5 to 13 km/h becoming northwest after midnight.

    Chance
    T-storms

    Low: 24 °C

  • Monday

    Monday: Showers and thunderstorms likely, mainly after 9am.  Mostly cloudy, with a high near 29. North wind 5 to 11 km/h becoming southeast in the afternoon.  Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

    T-storms
    Likely

    High: 29 °C

  • Monday
    Night

    Monday Night: Showers and thunderstorms likely.  Mostly cloudy, with a low around 23. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 cm possible.

    T-storms
    Likely

    Low: 23 °C

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms before noon.  Mostly cloudy, with a high near 27.

    Chance
    T-storms then
    Mostly Cloudy

    High: 27 °C

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 20.

    Mostly Cloudy

    Low: 20 °C

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 34. Heat index values as high as 41. Southwest wind 11 to 21 km/h.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 26. West wind 11 to 16 km/h.
Sunday
A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 34. Heat index values as high as 41. West wind 11 to 18 km/h.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 24. West wind 5 to 13 km/h becoming northwest after midnight.
Monday
Showers and thunderstorms likely, mainly after 9am. Mostly cloudy, with a high near 29. North wind 5 to 11 km/h becoming southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 23. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 cm possible.
Tuesday
A 40 percent chance of showers and thunderstorms before noon. Mostly cloudy, with a high near 27.
Tuesday Night
Mostly cloudy, with a low around 20.
Wednesday
Mostly sunny, with a high near 27.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 28.
Thursday Night
Mostly cloudy, with a low around 21.
Friday
Mostly sunny, with a high near 28.
Click Map For Forecast
Point Forecast:
West Sayville NY
 40.74°N 73.1°W (Elev. 9 m)
7:31 am EDT Jul 20, 2019
10am EDT Jul 20, 2019-6pm EDT Jul 26, 2019
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database