Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

81°F

27°C

Humidity 51%
Wind Speed N 5 mph
Barometer 30.11 in (1019.5 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 21 Jun 9:56 am EDT
Extended Forecast for

East Setauket NY

Extreme Heat Watch June 22, 12:00pm until June 24, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
  • Today

    Today: Mostly sunny, with a high near 86. Southwest wind 5 to 7 mph.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 71. South wind around 7 mph.

    Low: 71 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 2pm.  Mostly sunny, with a high near 91. Heat index values as high as 95. Southwest wind 10 to 13 mph.

    High: 91 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. West wind 6 to 9 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. Northwest wind around 7 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 86. Southwest wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 71. South wind around 7 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 2pm. Mostly sunny, with a high near 91. Heat index values as high as 95. Southwest wind 10 to 13 mph.
Sunday Night
Mostly clear, with a low around 74. West wind 6 to 9 mph.
Monday
Sunny, with a high near 94. Northwest wind around 7 mph.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
Mostly cloudy, with a low around 67.
Thursday
Partly sunny, with a high near 80.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
3:17 am EDT Jun 21, 2025
10am EDT Jun 21, 2025-6pm EDT Jun 27, 2025
 
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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