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.

Light Rain Fog/Mist

34°F

1°C

Humidity 97%
Wind Speed NE 5 mph
Barometer 30.28 in (1025.5 mb)
Dewpoint 33°F (1°C)
Visibility 3.00 mi
Wind Chill29°F (-2°C)
Last update 3 Mar 6:56 pm EST
Extended Forecast for

Islip Terrace NY

  • Tonight

    Tonight: Rain, mainly before 4am. Patchy fog. Low around 35. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. Light and variable wind.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 33. Calm wind.

    Low: 33 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain likely, mainly between 10am and 1pm. Cloudy, with a high near 43. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain. Low around 36. Calm wind becoming northeast around 6 mph in the evening. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 36 °F

    Rain

  • Friday

    Friday: A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.

    High: 45 °F

    Chance Rain

  • Friday Night

    Friday Night: Cloudy, with a low around 35.

    Low: 35 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 51.

    High: 51 °F

    Cloudy

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

Detailed Forecast

Tonight
Rain, mainly before 4am. Patchy fog. Low around 35. Calm wind becoming southwest around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Mostly sunny, with a high near 47. Light and variable wind.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 33. Calm wind.
Thursday
Rain likely, mainly between 10am and 1pm. Cloudy, with a high near 43. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Rain. Low around 36. Calm wind becoming northeast around 6 mph in the evening. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A 40 percent chance of rain before 1pm. Cloudy, with a high near 45.
Friday Night
Cloudy, with a low around 35.
Saturday
Cloudy, with a high near 51.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 56.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
7:28 pm EST Mar 3, 2026
Forecast Valid:
7pm EST Mar 3, 2026-6pm EDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation