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.

A Few Clouds

31°C

88°F

Humidity 43%
Wind Speed SW 19 km/h
Barometer 1009.7 mb (29.82 in)
Dewpoint 17°C (63°F)
Visibility 16 km
Heat Index32°C (89°F)
Last update 3 Jul 1:56 pm EDT
Extended Forecast for

East Islip NY

Severe T-storm Watch until July 3, 10:00pm
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until July 3, 10:00pm

    NOW until 10:00pm Thu

    Severe T-storm Watch

  • This Afternoon

    High: 30 °C

    Severe
    Thunderstorms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could be severe. Partly cloudy, with a low around 20. Northwest wind around 11 km/h.

    Low: 20 °C

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Independence Day

    Independence Day: Sunny, with a high near 29. Northwest wind 11 to 13 km/h becoming west in the afternoon.

    High: 29 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 19. West wind 5 to 10 km/h becoming calm after midnight.

    Low: 19 °C

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 28. Light and variable wind becoming south 8 to 13 km/h in the morning.

    High: 28 °C

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 20.

    Low: 20 °C

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 28.

    High: 28 °C

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22.

    Low: 22 °C

    Partly Cloudy

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 30. Southwest wind around 16 km/h.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could be severe. Partly cloudy, with a low around 20. Northwest wind around 11 km/h.
Independence Day
Sunny, with a high near 29. Northwest wind 11 to 13 km/h becoming west in the afternoon.
Friday Night
Mostly clear, with a low around 19. West wind 5 to 10 km/h becoming calm after midnight.
Saturday
Mostly sunny, with a high near 28. Light and variable wind becoming south 8 to 13 km/h in the morning.
Saturday Night
Partly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 28.
Sunday Night
Partly cloudy, with a low around 22.
Monday
Partly sunny, with a high near 28.
Monday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 22.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 28.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 22.
Wednesday
A 30 percent chance of showers. Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
East Islip NY
 40.73°N 73.19°W (Elev. 16 m)
Last Update:
1:40 pm EDT Jul 3, 2025
Forecast Valid:
2pm EDT Jul 3, 2025-6pm EDT Jul 9, 2025
 
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