National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Rain Fog/Mist

53°F

12°C

Humidity 86%
Wind Speed E 14 G 23 mph
Barometer 29.47 in (998.0 mb)
Dewpoint 49°F (9°C)
Visibility 4.00 mi
Wind Chill49°F (9°C)
Last update 12 Nov 2:56 pm EST
Extended Forecast for

Nissequogue NY

  • This Afternoon

    This Afternoon: Showers. High near 59. East wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 59 °F

    Showers

  • Tonight

    Tonight: Showers before midnight, then rain after midnight. Low around 40. Windy, with an east wind 21 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 40 °F

    Showers and
    Windy

  • Friday

    Friday: Rain, mainly before 4pm. High near 47. Windy, with a north wind 23 to 28 mph decreasing to 17 to 22 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain and
    Windy

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly between 7pm and 10pm. Mostly cloudy, with a low around 38. North wind around 14 mph.

    Low: 38 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 48. Northwest wind around 14 mph.

    High: 48 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

This Afternoon
Showers. High near 59. East wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Showers before midnight, then rain after midnight. Low around 40. Windy, with an east wind 21 to 26 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Rain, mainly before 4pm. High near 47. Windy, with a north wind 23 to 28 mph decreasing to 17 to 22 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
A 30 percent chance of rain, mainly between 7pm and 10pm. Mostly cloudy, with a low around 38. North wind around 14 mph.
Saturday
Partly sunny, with a high near 48. Northwest wind around 14 mph.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 57.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Nissequogue NY
 40.92°N 73.18°W (Elev. 23 ft)
Last Update:
2:08 pm EST Nov 12, 2026
Forecast Valid:
3pm EST Nov 12, 2026-6pm EST Nov 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation