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.

A Few Clouds

45°F

7°C

Humidity 90%
Wind Speed Calm
Barometer 30.29 in (1025.8 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 2 Nov 7:56 am EST
Extended Forecast for

Islip NY

  • Today

    Today: Sunny, with a high near 59. Northwest wind 5 to 7 mph becoming southwest in the afternoon.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 46. Southwest wind 3 to 5 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of rain after 1pm. Partly sunny, with a high near 61. South wind 5 to 13 mph.

    High: 61 °F

    Partly Sunny
    then Chance
    Rain

  • Monday Night

    Monday Night: A 20 percent chance of rain before 1am. Mostly cloudy, then gradually becoming clear, with a low around 46. Southwest wind 11 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.

    Low: 46 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Sunny, with a high near 60. Northwest wind 13 to 16 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 59. Northwest wind 5 to 7 mph becoming southwest in the afternoon.
Tonight
Partly cloudy, with a low around 46. Southwest wind 3 to 5 mph.
Monday
A 40 percent chance of rain after 1pm. Partly sunny, with a high near 61. South wind 5 to 13 mph.
Monday Night
A 20 percent chance of rain before 1am. Mostly cloudy, then gradually becoming clear, with a low around 46. Southwest wind 11 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Tuesday
Sunny, with a high near 60. Northwest wind 13 to 16 mph.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 40.
Friday
Partly sunny, with a high near 61.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 50.
Saturday
A 40 percent chance of rain. Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
4:17 am EST Nov 2, 2025
Forecast Valid:
8am EST Nov 2, 2025-6pm EST Nov 8, 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