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Storm Moving Through the Upper Midwest to the Northeast

Heavy rain and the potential for strong thunderstorms along and east of the Appalachians will precede a cold front, while snow showers will fall behind the front in the Ohio Valley, Upper Midwest and Great Lake States. Rain-on-snow flooding is possible in portions of New England and New York State. Rain and high elevation snow will return to the west. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

59°F

15°C

Humidity 90%
Wind Speed S 13 mph
Barometer 29.54 in (1000.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 25 Feb 3:56 pm EST
Extended Forecast for

Port Jefferson NY

  • Tonight

    Tonight: Showers, mainly before 10pm.  Low around 38. South wind 10 to 14 mph becoming northwest after midnight.  Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Showers then
    Partly Cloudy

    Low: 38 °F

  • Sunday

    Sunday: Sunny, with a high near 43. Wind chill values between 30 and 35. Breezy, with a west wind 13 to 20 mph.

    Sunny and
    Breezy

    High: 43 °F

  • Sunday
    Night

    Sunday Night: Clear, with a low around 29. West wind 5 to 9 mph becoming light.

    Clear

    Low: 29 °F

  • Monday

    Monday: Sunny, with a high near 51. Wind chill values between 25 and 35 early. Southwest wind 7 to 13 mph.

    Sunny

    High: 51 °F

  • Monday
    Night

    Monday Night: A 20 percent chance of rain after 1am.  Increasing clouds, with a low around 41. South wind 5 to 8 mph becoming calm  after midnight.

    Mostly Cloudy
    then Slight
    Chance Rain

    Low: 41 °F

  • Tuesday

    Tuesday: A 50 percent chance of rain.  Mostly cloudy, with a high near 51.

    Chance Rain

    High: 51 °F

  • Tuesday
    Night

    Tuesday Night: Rain likely, mainly after midnight.  Cloudy, with a low around 44. Chance of precipitation is 60%.

    Rain Likely

    Low: 44 °F

  • Wednesday

    Wednesday: Rain likely.  Cloudy, with a high near 59. Chance of precipitation is 60%.

    Rain Likely

    High: 59 °F

  • Wednesday
    Night

    Wednesday Night: Rain likely.  Areas of fog.  Otherwise, cloudy, with a low around 51. Chance of precipitation is 60%.

    Rain Likely
    and Areas Fog

    Low: 51 °F

Detailed Forecast

Tonight
Showers, mainly before 10pm. Low around 38. South wind 10 to 14 mph becoming northwest after midnight. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Sunny, with a high near 43. Wind chill values between 30 and 35. Breezy, with a west wind 13 to 20 mph.
Sunday Night
Clear, with a low around 29. West wind 5 to 9 mph becoming light.
Monday
Sunny, with a high near 51. Wind chill values between 25 and 35 early. Southwest wind 7 to 13 mph.
Monday Night
A 20 percent chance of rain after 1am. Increasing clouds, with a low around 41. South wind 5 to 8 mph becoming calm after midnight.
Tuesday
A 50 percent chance of rain. Mostly cloudy, with a high near 51.
Tuesday Night
Rain likely, mainly after midnight. Cloudy, with a low around 44. Chance of precipitation is 60%.
Wednesday
Rain likely. Cloudy, with a high near 59. Chance of precipitation is 60%.
Wednesday Night
Rain likely. Areas of fog. Otherwise, cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers before 3pm. Partly sunny, with a high near 55.
Thursday Night
Partly cloudy, with a low around 28. Breezy.
Friday
Mostly sunny, with a high near 38.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 34.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
3:22 pm EST Feb 25, 2017
4pm EST Feb 25, 2017-6pm EST Mar 4, 2017
 
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Additional Resources

Radar & Satellite Image

Northeast Radar Mosaic Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database