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

52°F

11°C

Humidity 77%
Wind Speed S 7 mph
Barometer 30.07 in (1018.1 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 13 May 3:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Today

    Today: Partly sunny, with a high near 67. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 67 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Tonight

    Tonight: Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. South wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then showers between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 65. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 65 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 51. Light northwest wind.

    Low: 51 °F

    Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 68. North wind 6 to 8 mph.

    High: 68 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 67. Breezy, with a south wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 36 mph.
Tonight
Showers likely, mainly after 2am. Mostly cloudy, with a low around 53. South wind 7 to 13 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm before 11am, then showers between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 65. Southeast wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 51. Light northwest wind.
Friday
A 40 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 68. North wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.74°N 73.16°W (Elev. 7 ft)
Last Update:
2:29 am EDT May 13, 2026
Forecast Valid:
4am EDT May 13, 2026-6pm EDT May 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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