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.

Fair

44°F

7°C

Humidity 71%
Wind Speed W 7 mph
Barometer 29.96 in (1014.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 10 Nov 1:56 am EST
Extended Forecast for

Islip NY

  • Overnight

    Overnight: Mostly clear, with a low around 39. West wind around 7 mph.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 61. West wind 8 to 14 mph.

    High: 61 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 44. West wind around 9 mph.

    Low: 44 °F

    Clear

  • Veterans Day

    Veterans Day: Increasing clouds, with a high near 59. West wind 5 to 8 mph.

    High: 59 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 45. Calm wind becoming east around 5 mph after midnight.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain, mainly after 1pm. High near 61. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Rain

  • Friday

    Friday: Rain. High near 51. Chance of precipitation is 80%.

    High: 51 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 39. West wind around 7 mph.
Tuesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 61. West wind 8 to 14 mph.
Tuesday Night
Clear, with a low around 44. West wind around 9 mph.
Veterans Day
Increasing clouds, with a high near 59. West wind 5 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 45. Calm wind becoming east around 5 mph after midnight.
Thursday
Rain, mainly after 1pm. High near 61. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain. Low around 42. Chance of precipitation is 80%.
Friday
Rain. High near 51. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 49.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
1:34 am EST Nov 10, 2026
Forecast Valid:
3am EST Nov 10, 2026-6pm EST Nov 16, 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