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.

Light Rain

57°F

14°C

Humidity 78%
Wind Speed E 18 G 31 mph
Barometer 29.47 in (998.0 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 12 Nov 1:56 pm EST
Extended Forecast for

Central Islip NY

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 60. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers

  • Tonight

    Tonight: Showers before midnight, then rain after midnight. Low around 37. Northeast wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Showers

  • Friday

    Friday: Rain, mainly before 4pm. High near 47. Breezy, with a north wind 13 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 34. North wind 7 to 9 mph.

    Low: 34 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 48. Northwest wind 8 to 13 mph.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 60. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers before midnight, then rain after midnight. Low around 37. Northeast wind 14 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 47. Breezy, with a north wind 13 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of rain, mainly before 10pm. Mostly cloudy, with a low around 34. North wind 7 to 9 mph.
Saturday
Partly sunny, with a high near 48. Northwest wind 8 to 13 mph.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 34.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Clear, with a low around 36.
Wednesday
Sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Central Islip NY
 40.77°N 73.21°W (Elev. 49 ft)
Last Update:
2:08 pm EST Nov 12, 2026
Forecast Valid:
2pm EST Nov 12, 2026-6pm EST Nov 18, 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