Below Normal Temperatures Continue

A strong cold front will sweep through the East on Wednesday with heavy wet snow from the eastern Great Lakes into northern New England and strong thunderstorms with damaging winds in the Mid-Atlantic and Northeast. The big story though will continue to be the well below average temperatures behind this storm system or east of the Rockies, as numerous record low temperatures are likely. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

53°F

12°C

Humidity 83%
Wind Speed S 9 G 21 mph
Barometer 29.88 in (1011.9 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 Apr 1:56 am EDT
Extended Forecast for

Port Jefferson NY

  • Overnight

    Overnight: Mostly clear, with a low around 51. South wind around 11 mph.

    Mostly Clear

    Low: 51 °F

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 3pm.  Increasing clouds, with a high near 61. South wind 13 to 18 mph, with gusts as high as 29 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Slight Chance
    Showers then
    Showers
    Likely

    High: 61 °F

  • Wednesday
    Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 11pm.  Low around 35. Wind chill values between 25 and 30. Breezy, with a west wind 18 to 23 mph, with gusts as high as 33 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Showers then
    Mostly Clear
    and Breezy

    Low: 35 °F

  • Thursday

    Thursday: Mostly sunny, with a high near 52. Breezy, with a west wind 22 to 24 mph, with gusts as high as 36 mph.

    Mostly Sunny
    and Breezy

    High: 52 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 40. Breezy, with a west wind around 21 mph, with gusts as high as 32 mph.

    Partly Cloudy
    and Breezy

    Low: 40 °F

  • Friday

    Friday: Sunny, with a high near 60. Breezy.

    Sunny and
    Breezy

    High: 60 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 46.

    Mostly Clear

    Low: 46 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    Mostly Sunny

    High: 63 °F

  • Saturday
    Night

    Saturday Night: Rain likely, mainly after 2am.  Mostly cloudy, with a low around 48. Chance of precipitation is 60%.

    Rain Likely

    Low: 48 °F

Detailed Forecast

Overnight
Mostly clear, with a low around 51. South wind around 11 mph.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 3pm. Increasing clouds, with a high near 61. South wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 11pm. Low around 35. Wind chill values between 25 and 30. Breezy, with a west wind 18 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 52. Breezy, with a west wind 22 to 24 mph, with gusts as high as 36 mph.
Thursday Night
Partly cloudy, with a low around 40. Breezy, with a west wind around 21 mph, with gusts as high as 32 mph.
Friday
Sunny, with a high near 60. Breezy.
Friday Night
Mostly clear, with a low around 46.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Sunday
Rain likely, mainly before 1pm. Mostly cloudy, with a high near 57. Chance of precipitation is 70%.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 64.
Click Map For Forecast
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
12:40 am EDT Apr 21, 2021
2am EDT Apr 21, 2021-6pm EDT Apr 27, 2021
 
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Additional Resources

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