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

67°F

19°C

Humidity 47%
Wind Speed NW 10 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 8 Nov 11:56 am EST
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 67. Northwest wind 8 to 11 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Northwest wind 5 to 7 mph becoming east after midnight.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 63. Southeast wind 10 to 16 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 63 °F

    Chance Rain
    then Rain
    Likely

  • Sunday Night

    Sunday Night: Rain, mainly before midnight. Low around 50. East wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 50 °F

    Rain then
    Chance Rain

  • Monday

    Monday: A 20 percent chance of showers before noon. Partly sunny, with a high near 58. West wind 8 to 14 mph.

    High: 58 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 47. Breezy.

    High: 47 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 54. Breezy.

    High: 54 °F

    Partly Sunny
    and Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 67. Northwest wind 8 to 11 mph.
Tonight
Partly cloudy, with a low around 47. Northwest wind 5 to 7 mph becoming east after midnight.
Sunday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 63. Southeast wind 10 to 16 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain, mainly before midnight. Low around 50. East wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A 20 percent chance of showers before noon. Partly sunny, with a high near 58. West wind 8 to 14 mph.
Monday Night
Partly cloudy, with a low around 31.
Veterans Day
Mostly sunny, with a high near 47. Breezy.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 54. Breezy.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 54. Breezy.
Thursday Night
Mostly clear, with a low around 38.
Friday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
Last Update:
10:14 am EST Nov 8, 2025
Forecast Valid:
12pm EST Nov 8, 2025-6pm EST Nov 14, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation