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

Winter Storm for south-central U.S.; Critical Fire Weather in the West; Tracking Zeta

Heavy snow will continue to spread south along the Rockies through Monday. An area of freezing rain and sleet is forecast to develop over portions of the southern Plains to start the week. Meanwhile, dry and gusty conditions will continue critical fire weather conditions from California into southern New Mexico. Zeta is forecast to become a hurricane tracking north across the Gulf of Mexico. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

54°F

12°C

Humidity 75%
Wind Speed E 12 mph
Barometer 30.25 in (1024.2 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 25 Oct 11:56 pm EDT
Extended Forecast for

Port Jefferson NY

  • Overnight

    Overnight: Light rain likely. Cloudy, with a low around 49. East wind around 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Light Rain
    Likely

    Low: 49 °F

  • Monday

    Monday: Light rain likely before 9am, then a chance of drizzle or light rain after 9am. Patchy fog after 9am. Otherwise, cloudy, with a high near 59. East wind 10 to 15 mph. Chance of precipitation is 60%.

    Light Rain
    Likely and
    Patchy Fog

    High: 59 °F

  • Monday
    Night

    Monday Night: A slight chance of drizzle or light rain before midnight, then a slight chance of light rain between midnight and 3am. Patchy fog before midnight. Otherwise, mostly cloudy, with a steady temperature around 57. East wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 20%.

    Slight Chance
    Light Rain
    and Patchy
    Fog

    Low: 57 °F

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly cloudy, with a steady temperature around 55. North wind 7 to 11 mph.

    Mostly Cloudy
    then Slight
    Chance Rain

    High: 55 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 47. North wind 6 to 9 mph.

    Slight Chance
    Rain

    Low: 47 °F

  • Wednesday

    Wednesday: Partly sunny, with a high near 57.

    Partly Sunny

    High: 57 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 51.

    Partly Cloudy

    Low: 51 °F

  • Thursday

    Thursday: A 50 percent chance of rain. Mostly cloudy, with a high near 60.

    Chance Rain

    High: 60 °F

  • Thursday
    Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.

    Rain Likely

    Low: 44 °F

Detailed Forecast

Overnight
Light rain likely. Cloudy, with a low around 49. East wind around 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Light rain likely before 9am, then a chance of drizzle or light rain after 9am. Patchy fog after 9am. Otherwise, cloudy, with a high near 59. East wind 10 to 15 mph. Chance of precipitation is 60%.
Monday Night
A slight chance of drizzle or light rain before midnight, then a slight chance of light rain between midnight and 3am. Patchy fog before midnight. Otherwise, mostly cloudy, with a steady temperature around 57. East wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of rain after noon. Mostly cloudy, with a steady temperature around 55. North wind 7 to 11 mph.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 47. North wind 6 to 9 mph.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 60.
Thursday Night
Rain likely. Mostly cloudy, with a low around 44. Chance of precipitation is 70%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 54.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 38.
Saturday
Sunny, with a high near 53.
Saturday Night
Mostly clear, with a low around 43.
Sunday
Sunny, with a high near 58.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
Last Update:
10:25 pm EDT Oct 25, 2020
Forecast Valid:
12am EDT Oct 26, 2020-6pm EDT Oct 31, 2020
 
Forecast Discussion
 
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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