National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

47°F

8°C

Humidity 61%
Wind Speed SW 7 mph
Barometer 29.89 in (1012.3 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 4 May 12:56 am EDT
Extended Forecast for

Commack NY

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 49. Southwest wind around 7 mph.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 70. Southwest wind 14 to 17 mph, with gusts as high as 28 mph.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 53. South wind 10 to 13 mph.

    Low: 53 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 75. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon.

    High: 75 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 56. Breezy, with a south wind 16 to 21 mph.

    Low: 56 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Showers, mainly after 2pm. High near 64. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers. Low around 48. Chance of precipitation is 80%.

    Low: 48 °F

    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 49. Southwest wind around 7 mph.
Monday
Sunny, with a high near 70. Southwest wind 14 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 53. South wind 10 to 13 mph.
Tuesday
Mostly sunny, with a high near 75. Breezy, with a southwest wind 10 to 15 mph increasing to 17 to 22 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 56. Breezy, with a south wind 16 to 21 mph.
Wednesday
Showers, mainly after 2pm. High near 64. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Showers. Low around 48. Chance of precipitation is 80%.
Thursday
Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Thursday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 43.
Friday
Sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 48.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 65.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Commack NY
 40.85°N 73.28°W (Elev. 144 ft)
Last Update:
10:12 pm EDT May 3, 2026
Forecast Valid:
1am EDT May 4, 2026-6pm EDT May 10, 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