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.

Fair

47°F

8°C

Humidity 50%
Wind Speed N 6 mph
Barometer 30.31 in (1026.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 21 Apr 3:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Today

    Today: Partly sunny, with a high near 56. Northeast wind 6 to 11 mph becoming southeast in the afternoon.

    High: 56 °F

    Partly Sunny

  • Tonight

    Tonight: Showers likely, mainly after 2am. Cloudy, with a steady temperature around 51. Southeast wind 10 to 14 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 72. Southwest wind 7 to 10 mph. Chance of precipitation is 60%.

    High: 72 °F

    Showers
    Likely then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 56. Northeast wind 6 to 11 mph becoming southeast in the afternoon.
Tonight
Showers likely, mainly after 2am. Cloudy, with a steady temperature around 51. Southeast wind 10 to 14 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers likely before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 72. Southwest wind 7 to 10 mph. Chance of precipitation is 60%.
Tuesday Night
Mostly cloudy, with a low around 49. Northwest wind 5 to 7 mph becoming calm after midnight.
Wednesday
Mostly sunny, with a high near 66. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Partly sunny, with a high near 62.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 60%.
Saturday
Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Sunday
Sunny, with a high near 63.
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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:
3:13 am EDT Apr 21, 2025
Forecast Valid:
4am EDT Apr 21, 2025-6pm EDT Apr 27, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data 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