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

50°F

10°C

Humidity 77%
Wind Speed SW 9 mph
Barometer 29.89 in (1012.1 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 2 May 12:56 am EDT
Extended Forecast for

Islip Terrace NY

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 5am. Cloudy, with a low around 47. South wind around 8 mph.

    Low: 47 °F

    Chance Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 11am. Cloudy, with a high near 60. Southwest wind 8 to 10 mph becoming northwest in the afternoon.

    High: 60 °F

    Chance Rain
    then Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 43. North wind 5 to 8 mph.

    Low: 43 °F

    Chance Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 61. West wind around 11 mph.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. Southwest wind 3 to 6 mph.

    Low: 46 °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.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Cloudy, with a low around 47. South wind around 8 mph.
Saturday
A 30 percent chance of rain before 11am. Cloudy, with a high near 60. Southwest wind 8 to 10 mph becoming northwest in the afternoon.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43. North wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 61. West wind around 11 mph.
Sunday Night
Mostly clear, with a low around 46. Southwest wind 3 to 6 mph.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 63.
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 70%.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip Terrace NY
 40.75°N 73.18°W (Elev. 30 ft)
Last Update:
10:18 pm EDT May 1, 2026
Forecast Valid:
1am EDT May 2, 2026-6pm EDT May 8, 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