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.

Overcast

41°F

5°C

Humidity 70%
Wind Speed NE 7 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 14 Mar 1:56 am EDT
Extended Forecast for

Central Islip NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 36. North wind around 7 mph.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 53. Northeast wind around 8 mph becoming east in the afternoon.

    High: 53 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. Light southeast wind.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Patchy drizzle with a slight chance of showers before 8am, then a slight chance of showers or drizzle between 8am and 2pm, then a chance of showers after 2pm. Mostly cloudy, with a high near 53. South wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 53 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a steady temperature around 49. South wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 58. Breezy.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers, mainly after 8pm. Low around 46. Breezy. Chance of precipitation is 90%.

    Low: 46 °F

    Showers and
    Breezy

  • Monday

    Monday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.

    High: 56 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 35.

    Low: 35 °F

    Chance
    Showers then
    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 36. North wind around 7 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 53. Northeast wind around 8 mph becoming east in the afternoon.
Friday Night
Partly cloudy, with a low around 37. Light southeast wind.
Saturday
Patchy drizzle with a slight chance of showers before 8am, then a slight chance of showers or drizzle between 8am and 2pm, then a chance of showers after 2pm. Mostly cloudy, with a high near 53. South wind 3 to 7 mph. Chance of precipitation is 30%.
Saturday Night
A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a steady temperature around 49. South wind 7 to 10 mph, with gusts as high as 20 mph.
Sunday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 58. Breezy.
Sunday Night
Showers, mainly after 8pm. Low around 46. Breezy. Chance of precipitation is 90%.
Monday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 35.
Tuesday
Sunny, with a high near 55.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Mostly sunny, with a high near 57.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 56.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Central Islip NY
 40.79°N 73.2°W (Elev. 98 ft)
Last Update:
10:14 pm EDT Mar 13, 2025
Forecast Valid:
2am EDT Mar 14, 2025-6pm EDT Mar 20, 2025
 
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