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.

Mostly Cloudy

47°F

8°C

Humidity 42%
Wind Speed NW 15 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 6 Nov 8:56 pm EST
Extended Forecast for

Lake Ronkonkoma NY

Frost Advisory November 7, 12:00am until November 7, 08:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Areas of frost after 4am. Otherwise, mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 34 °F

    Mostly Clear
    then Areas
    Frost

  • Friday

    Friday: Areas of frost before 7am. Otherwise, mostly sunny, with a high near 61. Light south wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 28 mph.

    High: 61 °F

    Areas Frost
    then Partly
    Sunny

  • Friday Night

    Friday Night: Light rain likely, mainly after 10pm. Cloudy, with a steady temperature around 56. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Light Rain
    Likely

  • Saturday

    Saturday: A 50 percent chance of light rain before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 65. West wind 7 to 9 mph.

    High: 65 °F

    Chance Light
    Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming light and variable.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 62. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Rain Likely

  • Monday

    Monday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53.

    High: 53 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Areas of frost after 4am. Otherwise, mostly clear, with a low around 34. Northwest wind 5 to 7 mph becoming calm after midnight.
Friday
Areas of frost before 7am. Otherwise, mostly sunny, with a high near 61. Light south wind increasing to 12 to 17 mph in the morning. Winds could gust as high as 28 mph.
Friday Night
Light rain likely, mainly after 10pm. Cloudy, with a steady temperature around 56. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 50 percent chance of light rain before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 65. West wind 7 to 9 mph.
Saturday Night
Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming light and variable.
Sunday
Rain, mainly after 1pm. High near 62. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Monday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 53.
Monday Night
Partly cloudy, with a low around 32.
Veterans Day
Mostly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 37.
Wednesday
Partly sunny, with a high near 54.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.11°W (Elev. 98 ft)
Last Update:
1:21 pm EST Nov 6, 2025
Forecast Valid:
9pm EST Nov 6, 2025-6pm EST Nov 13, 2025
 
Forecast Discussion
 
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Additional Resources

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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