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

54°F

12°C

Humidity 53%
Wind Speed NW 7 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 2 Nov 9:56 am EST
Extended Forecast for

Islip Terrace NY

  • Today

    Today: Sunny, with a high near 58. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 45. Light southwest wind.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of rain after 1pm. Partly sunny, with a high near 61. Light southwest wind becoming south 8 to 13 mph in the morning.

    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 9 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 11 to 15 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °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 43.

    Low: 43 °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 58. Northwest wind around 7 mph becoming southwest in the afternoon.
Tonight
Partly cloudy, with a low around 45. Light southwest wind.
Monday
A 40 percent chance of rain after 1pm. Partly sunny, with a high near 61. Light southwest wind becoming south 8 to 13 mph in the morning.
Monday Night
A 20 percent chance of rain before 1am. Mostly cloudy, then gradually becoming clear, with a low around 46. Southwest wind 9 to 13 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Tuesday
Sunny, with a high near 60. Northwest wind 11 to 15 mph.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Partly sunny, with a high near 61.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43.
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 49.
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 Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
4:17 am EST Nov 2, 2025
Forecast Valid:
10am 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