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

33°F

1°C

Humidity 78%
Wind Speed NE 3 mph
Barometer 30.12 in (1019.9 mb)
Dewpoint 27°F (-3°C)
Visibility 8.00 mi
Last update 7 Nov 5:56 am EST
Extended Forecast for

Lake Ronkonkoma NY

Frost Advisory November 7, 06:26am until November 7, 08:00am
Click here for hazard details and duration
...
  •  
    Frost Advisory November 7, 06:26am until November 7, 08:00am

    NOW until 8:00am Fri

    Frost Advisory

  • Today

    High: 61 °F

    Areas Frost
    then Partly
    Sunny

  • Tonight

    Tonight: Showers, mainly between 10pm and 4am. Steady temperature around 56. South wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 65. West wind 7 to 9 mph.

    High: 65 °F

    Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 46. Northwest wind around 5 mph becoming light and variable.

    Low: 46 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 62. Southeast wind 6 to 13 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Slight Chance
    Rain then
    Rain Likely

  • Sunday Night

    Sunday Night: Rain. Low around 47. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain

  • Monday

    Monday: A 40 percent chance of showers before 1pm. Partly sunny, with a high near 55.

    High: 55 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Today
Areas of frost before 7am. Otherwise, partly sunny, with a high near 61. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 30 mph.
Tonight
Showers, mainly between 10pm and 4am. Steady temperature around 56. South wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A 30 percent chance of showers before 10am. 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 46. Northwest wind around 5 mph becoming light and variable.
Sunday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 62. Southeast wind 6 to 13 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Rain. Low around 47. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 55.
Monday Night
Partly cloudy, with a low around 33.
Veterans Day
Mostly sunny, with a high near 47.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.11°W (Elev. 98 ft)
Last Update:
5:51 am EST Nov 7, 2025
Forecast Valid:
6am EST Nov 7, 2025-6pm EST Nov 13, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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