Heat Will Continue in the Southeast and Portions of the West

A very hot and humid airmass will persist over portions of the southeast. Afternoon high temperatures in these areas are forecast to reach 95 to 100 degrees with heat index values ranging from 100 to 110 degrees. Hot temperatures are also expected over portions of the west. A few severe thunderstorms will be possible over the Plains and the Middle Atlantic with heavy rain potential in the south. Read More >

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

84°F

29°C

Humidity 57%
Wind Speed S 9 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 27 Jul 4:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • Tonight

    Tonight: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 72. Southwest wind 5 to 8 mph.

    Mostly Clear
    then Patchy
    Fog

    Low: 72 °F

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 3pm.  Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon.

    Patchy Fog
    then Slight
    Chance
    T-storms

    High: 88 °F

  • Thursday
    Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of rain and thunderstorms after 9pm.  Mostly cloudy, with a low around 73. South wind 5 to 9 mph.  Chance of precipitation is 40%.

    Slight Chance
    T-storms then
    Chance Rain

    Low: 73 °F

  • Friday

    Friday: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 11am.  Cloudy, with a steady temperature around 76. East wind 5 to 9 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Rain Likely

    High: 76 °F

  • Friday
    Night

    Friday Night: A 40 percent chance of rain and thunderstorms.  Mostly cloudy, with a low around 71. North wind around 7 mph.

    Chance Rain

    Low: 71 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 84.

    Mostly Sunny

    High: 84 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 71.

    Mostly Cloudy

    Low: 71 °F

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 82.

    Chance
    T-storms

    High: 82 °F

  • Sunday
    Night

    Sunday Night: A 40 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 71.

    Chance
    T-storms then
    Chance
    Showers

    Low: 71 °F

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, mostly clear, with a low around 72. Southwest wind 5 to 8 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 3pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of rain and thunderstorms after 9pm. Mostly cloudy, with a low around 73. South wind 5 to 9 mph. Chance of precipitation is 40%.
Friday
A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 11am. Cloudy, with a steady temperature around 76. East wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A 40 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 71. North wind around 7 mph.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Mostly cloudy, with a low around 71.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
Partly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
Sunny, with a high near 85.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
3:12 pm EDT Jul 27, 2016
5pm EDT Jul 27, 2016-6pm EDT Aug 3, 2016
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database