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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

57°F

14°C

Humidity 100%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 6 May 3:56 am EDT
Extended Forecast for

Port Jefferson NYSimilar City Names

  • Overnight

    Overnight: A 50 percent chance of showers, mainly before 5am. Patchy fog after 5am. Otherwise, cloudy, with a steady temperature around 54. South wind around 6 mph.

    Low: 54 °F

    Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: A slight chance of showers before 11am, then a slight chance of showers after 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 67. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: A slight chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 56. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 20%.

    Low: 56 °F

    Cloudy then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. North wind 7 to 9 mph becoming southeast in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers after 2am. Increasing clouds, with a low around 54. South wind around 8 mph.

    Low: 54 °F

    Mostly Clear
    then Chance
    Showers

  • Wednesday

    Wednesday: A 50 percent chance of showers before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 73.

    High: 73 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.

    Low: 51 °F

    Showers
    Likely

Detailed Forecast

Overnight
A 50 percent chance of showers, mainly before 5am. Patchy fog after 5am. Otherwise, cloudy, with a steady temperature around 54. South wind around 6 mph.
Monday
A slight chance of showers before 11am, then a slight chance of showers after 2pm. Patchy fog before 8am. Otherwise, cloudy, with a high near 67. Southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 56. Southwest wind 6 to 8 mph becoming northwest after midnight. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 71. North wind 7 to 9 mph becoming southeast in the afternoon.
Tuesday Night
A 50 percent chance of showers after 2am. Increasing clouds, with a low around 54. South wind around 8 mph.
Wednesday
A 50 percent chance of showers before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Thursday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 60.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 59.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 49.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Port Jefferson NYSimilar City Names
 40.95°N 73.05°W (Elev. 151 ft)
Last Update:
3:41 am EDT May 6, 2024
Forecast Valid:
4am EDT May 6, 2024-6pm EDT May 12, 2024
 
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Additional Resources

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High Temperature

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Chance of Precipitation