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

44°F

7°C

Humidity 51%
Wind Speed S 12 G 22 mph
Barometer 30.57 in (1035.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 29 Mar 11:56 am EDT
Extended Forecast for

East Islip NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 46. Southwest wind 13 to 16 mph.

    High: 46 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 42. Southwest wind around 18 mph.

    Low: 42 °F

    Increasing
    Clouds

  • Monday

    Monday: A 20 percent chance of showers after 2pm. Partly sunny, with a high near 53. Southwest wind 16 to 18 mph.

    High: 53 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • 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 47. Southwest wind 11 to 16 mph. Chance of precipitation is 20%.

    Low: 47 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers before 2pm. Partly sunny, with a high near 57. Southwest wind 13 to 18 mph.

    High: 57 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50. Breezy.

    Low: 50 °F

    Partly Cloudy
    and Breezy

  • Wednesday

    Wednesday: A 50 percent chance of showers after 2pm. Mostly sunny, with a high near 59. Breezy.

    High: 59 °F

    Breezy.
    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.

    Low: 43 °F

    Rain Likely

  • Thursday

    Thursday: A 50 percent chance of rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 46. Southwest wind 13 to 16 mph.
Tonight
Increasing clouds, with a low around 42. Southwest wind around 18 mph.
Monday
A 20 percent chance of showers after 2pm. Partly sunny, with a high near 53. Southwest wind 16 to 18 mph.
Monday Night
A slight chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 47. Southwest wind 11 to 16 mph. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of showers before 2pm. Partly sunny, with a high near 57. Southwest wind 13 to 18 mph.
Tuesday Night
Partly cloudy, with a low around 50. Breezy.
Wednesday
A 50 percent chance of showers after 2pm. Mostly sunny, with a high near 59. Breezy.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 43. Chance of precipitation is 70%.
Thursday
A 50 percent chance of rain. Mostly cloudy, with a high near 48.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 40.
Friday
Rain likely. Cloudy, with a high near 49. Chance of precipitation is 60%.
Friday Night
Rain likely. Cloudy, with a low around 42. Chance of precipitation is 60%.
Saturday
A 40 percent chance of rain. Cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.7°N 73.19°W (Elev. 0 ft)
Last Update:
2:25 am EDT Mar 29, 2026
Forecast Valid:
12pm EDT Mar 29, 2026-6pm EDT Apr 4, 2026
 
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