National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

55°F

13°C

Humidity 69%
Wind Speed SE 6 mph
Barometer 29.82 in (1009.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill54°F (12°C)
Last update 2 May 6:56 pm EDT
Extended Forecast for

Islip Terrace NY

  • Tonight

    Tonight: A 20 percent chance of showers before 2am. Cloudy during the early evening, then gradual clearing, with a low around 40. Light and variable wind becoming north 5 to 9 mph after midnight.

    Low: 40 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 61. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. West wind 3 to 7 mph.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. Southwest wind 11 to 16 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. South wind 7 to 10 mph.

    Low: 52 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Tuesday Night

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

    Low: 54 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.

    High: 64 °F

    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 2am. Cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

Detailed Forecast

Tonight
A 20 percent chance of showers before 2am. Cloudy during the early evening, then gradual clearing, with a low around 40. Light and variable wind becoming north 5 to 9 mph after midnight.
Sunday
Sunny, with a high near 61. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 47. West wind 3 to 7 mph.
Monday
Sunny, with a high near 65. Southwest wind 11 to 16 mph.
Monday Night
Mostly clear, with a low around 52. South wind 7 to 10 mph.
Tuesday
Sunny, with a high near 69.
Tuesday Night
Mostly cloudy, with a low around 54. Breezy.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 64. Breezy.
Wednesday Night
Showers likely, mainly after 2am. Cloudy, with a low around 53. Chance of precipitation is 70%.
Thursday
Showers. High near 62. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 62.
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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:
3:10 pm EDT May 2, 2026
Forecast Valid:
7pm EDT May 2, 2026-6pm EDT May 9, 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