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

57°F

14°C

Humidity 55%
Wind Speed Calm
Barometer 29.84 in (1010.5 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 2 May 1:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • This Afternoon

    This Afternoon: A 40 percent chance of showers. Mostly cloudy, with a steady temperature around 56. Northwest wind around 7 mph.

    High: 56 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 2am, then a chance of rain after 5am. Cloudy, then gradual clearing toward daybreak, with a low around 43. Light and variable wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 30%.

    Low: 43 °F

    Chance Rain

  • Sunday

    Sunday: A 30 percent chance of rain before 8am. Sunny, with a high near 60. Breezy, with a northwest wind 14 to 20 mph.

    High: 60 °F

    Chance Rain
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 47. Southwest wind 5 to 8 mph.

    Low: 47 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. South wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

This Afternoon
A 40 percent chance of showers. Mostly cloudy, with a steady temperature around 56. Northwest wind around 7 mph.
Tonight
A slight chance of showers before 2am, then a chance of rain after 5am. Cloudy, then gradual clearing toward daybreak, with a low around 43. Light and variable wind becoming north 5 to 10 mph after midnight. Chance of precipitation is 30%.
Sunday
A 30 percent chance of rain before 8am. Sunny, with a high near 60. Breezy, with a northwest wind 14 to 20 mph.
Sunday Night
Mostly clear, with a low around 47. Southwest wind 5 to 8 mph.
Monday
Sunny, with a high near 65. South wind 9 to 14 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 54.
Wednesday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 65.
Wednesday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
Showers. High near 62. Chance of precipitation is 80%.
Thursday Night
Showers. Low around 46. Chance of precipitation is 80%.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
Last Update:
11:19 am EDT May 2, 2026
Forecast Valid:
2pm 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