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

52°F

11°C

Humidity 47%
Wind Speed NW 13 mph
Barometer 29.90 in (1012.4 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 1 May 9:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Today

    Today: Sunny, with a high near 63. Northwest wind 6 to 8 mph becoming southwest in the afternoon.

    High: 63 °F

    Sunny

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 5am. Increasing clouds, with a low around 47. Southwest wind around 6 mph.

    Low: 47 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 8am, then a chance of rain, mainly after 2pm. Mostly cloudy, with a high near 58. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.

    High: 58 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 43. Calm wind becoming north 5 to 7 mph after midnight.

    Low: 43 °F

    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 61. Northwest wind 10 to 14 mph.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Breezy.

    High: 66 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 63. Northwest wind 6 to 8 mph becoming southwest in the afternoon.
Tonight
A 30 percent chance of showers, mainly after 5am. Increasing clouds, with a low around 47. Southwest wind around 6 mph.
Saturday
A chance of showers before 8am, then a chance of rain, mainly after 2pm. Mostly cloudy, with a high near 58. Southwest wind 3 to 6 mph. Chance of precipitation is 40%.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 43. Calm wind becoming north 5 to 7 mph after midnight.
Sunday
Mostly sunny, with a high near 61. Northwest wind 10 to 14 mph.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 66. Breezy.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Showers likely. Mostly cloudy, with a high near 65. Breezy. Chance of precipitation is 60%.
Wednesday Night
Showers likely. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Thursday
Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
3:35 am EDT May 1, 2026
Forecast Valid:
10am EDT May 1, 2026-6pm EDT May 7, 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