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.

Partly Cloudy

77°F

25°C

Humidity 66%
Wind Speed S 10 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 May 12:56 pm EDT
Extended Forecast for

East Islip NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. Southwest wind around 14 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 65. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 83. Southwest wind 8 to 15 mph. Chance of precipitation is 80%.

    High: 83 °F

    Mostly Sunny
    then Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 57. North wind 5 to 8 mph. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 68. North wind 6 to 8 mph becoming east in the afternoon.

    High: 68 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 64.

    High: 64 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 84. Southwest wind around 14 mph.
Tonight
Mostly cloudy, with a low around 65. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 83. Southwest wind 8 to 15 mph. Chance of precipitation is 80%.
Wednesday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 57. North wind 5 to 8 mph. Chance of precipitation is 80%.
Thursday
A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 68. North wind 6 to 8 mph becoming east in the afternoon.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
A 30 percent chance of showers after 2pm. Mostly cloudy, with a high near 64.
Friday Night
Showers likely, mainly after 2am. Cloudy, with a low around 50. Chance of precipitation is 70%.
Saturday
Showers. High near 62. Chance of precipitation is 80%.
Saturday Night
Showers. Low around 52. Chance of precipitation is 80%.
Sunday
Showers likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 53.
Memorial Day
Mostly cloudy, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 ft)
Last Update:
2:21 am EDT May 19, 2026
Forecast Valid:
1pm EDT May 19, 2026-6pm EDT May 25, 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