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.

Mostly Cloudy

59°F

15°C

Humidity 67%
Wind Speed W 13 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 7 Nov 2:56 pm EST
Extended Forecast for

2 Miles N Mount Sinai NY

  • Tonight

    Tonight: A slight chance of showers between 1am and 4am. Partly cloudy, with a low around 50. Breezy, with a west wind 20 to 24 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Breezy.
    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 62. Breezy, with a west wind 14 to 21 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. Breezy, with a west wind 16 to 20 mph.

    Low: 52 °F

    Mostly Clear
    and Breezy

  • Monday

    Monday: Mostly sunny, with a high near 59. Breezy, with a west wind 20 to 22 mph.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Breezy, with a west wind 14 to 20 mph.

    Low: 49 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of showers between 1am and 4am. Partly cloudy, with a low around 50. Breezy, with a west wind 20 to 24 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 62. Breezy, with a west wind 14 to 21 mph.
Sunday Night
Mostly clear, with a low around 52. Breezy, with a west wind 16 to 20 mph.
Monday
Mostly sunny, with a high near 59. Breezy, with a west wind 20 to 22 mph.
Monday Night
Mostly clear, with a low around 49. Breezy, with a west wind 14 to 20 mph.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 52.
Veterans Day
Sunny, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
A 30 percent chance of rain after 1pm. Partly sunny, with a high near 56.
Thursday Night
Rain likely. Mostly cloudy, with a low around 45. Windy. Chance of precipitation is 60%.
Friday
Rain likely. Partly sunny, with a high near 51. Windy. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41. Windy.
Saturday
Partly sunny, with a high near 50. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles N Mount Sinai NY
 40.97°N 73.02°W (Elev. 0 ft)
Last Update:
1:40 pm EST Nov 7, 2026
Forecast Valid:
3pm EST Nov 7, 2026-6pm EST Nov 14, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation