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

36°F

2°C

Humidity 86%
Wind Speed S 10 mph
Barometer 29.80 in (1009.2 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 14 Mar 6:56 am EDT
Extended Forecast for

East Setauket NY

  • Today

    Today: Mostly sunny, with a high near 47. Breezy, with a west wind 15 to 25 mph, with gusts as high as 41 mph.

    High: 47 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Increasing clouds, with a low around 31. West wind 11 to 16 mph decreasing to 5 to 10 mph after midnight.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 46. Northeast wind 6 to 10 mph becoming southeast in the afternoon.

    High: 46 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain after 2am. Temperature falling to near 41 by 8pm, then rising to around 48 during the remainder of the night. Southeast wind 9 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F⇑

    Mostly Cloudy
    then Rain

  • Monday

    Monday: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 58. Breezy, with a south wind 18 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Heavy Rain
    and Breezy

  • Monday Night

    Monday Night: Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Some thunder is also possible. Low around 35. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 35 °F

    Windy. Heavy
    Rain then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 44. Chance of precipitation is 30%.

    High: 44 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 47. Breezy, with a west wind 15 to 25 mph, with gusts as high as 41 mph.
Tonight
Increasing clouds, with a low around 31. West wind 11 to 16 mph decreasing to 5 to 10 mph after midnight.
Sunday
Partly sunny, with a high near 46. Northeast wind 6 to 10 mph becoming southeast in the afternoon.
Sunday Night
Rain after 2am. Temperature falling to near 41 by 8pm, then rising to around 48 during the remainder of the night. Southeast wind 9 to 14 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 58. Breezy, with a south wind 18 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain before 5am, then a chance of rain and snow. The rain could be heavy at times. Some thunder is also possible. Low around 35. Windy. Chance of precipitation is 100%. Little or no snow accumulation expected.
Tuesday
A chance of rain and snow before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 44. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 45.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
East Setauket NY
 40.94°N 73.11°W (Elev. 52 ft)
Last Update:
3:09 am EDT Mar 14, 2026
Forecast Valid:
7am EDT Mar 14, 2026-6pm EDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation