Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

60°F

16°C

Humidity 46%
Wind Speed S 9 mph
Barometer 30.39 in (1029.0 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 10 Oct 4:56 pm EDT
Extended Forecast for

Lake Ronkonkoma NY

High Wind Watch October 12, 12:00pm until October 13, 06:00am
Coastal Flood Warning October 12, 02:00pm until October 13, 08:00pm
Click here for hazard details and duration
High Wind Watch
Coastal Flood Warning
  • Tonight

    Tonight: Mostly cloudy, with a low around 52. South wind 3 to 7 mph.

    Low: 52 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain before 11am, then a slight chance of rain after 2pm.  Mostly cloudy, with a high near 67. East wind 5 to 11 mph.  Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly after 8pm.  Mostly cloudy, with a low around 58. East wind 11 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 58 °F

    Rain Likely

  • Sunday

    Sunday: Rain likely.  Cloudy, with a high near 65. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 40 mph.  Chance of precipitation is 70%. New precipitation amounts between three quarters and one inch possible.

    High: 65 °F

    Rain Likely
    and Breezy

  • Sunday Night

    Sunday Night: Rain.  Low around 55. Breezy, with a northeast wind around 25 mph, with gusts as high as 49 mph.  Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    Low: 55 °F

    Rain and
    Breezy

  • Columbus Day

    Columbus Day: Rain.  High near 64. Windy.  Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

    High: 64 °F

    Rain and
    Windy

  • Monday Night

    Monday Night: Showers.  Low around 53. Breezy.  Chance of precipitation is 80%.

    Low: 53 °F

    Showers and
    Breezy

  • Tuesday

    Tuesday: Showers likely, mainly before 8am.  Mostly cloudy, with a high near 65. Chance of precipitation is 60%.

    High: 65 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers before 2am.  Mostly cloudy, with a low around 52.

    Low: 52 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 52. South wind 3 to 7 mph.
Saturday
A slight chance of rain before 11am, then a slight chance of rain after 2pm. Mostly cloudy, with a high near 67. East wind 5 to 11 mph. Chance of precipitation is 20%.
Saturday Night
Rain likely, mainly after 8pm. Mostly cloudy, with a low around 58. East wind 11 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain likely. Cloudy, with a high near 65. Breezy, with a northeast wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New precipitation amounts between three quarters and one inch possible.
Sunday Night
Rain. Low around 55. Breezy, with a northeast wind around 25 mph, with gusts as high as 49 mph. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Columbus Day
Rain. High near 64. Windy. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.
Monday Night
Showers. Low around 53. Breezy. Chance of precipitation is 80%.
Tuesday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Tuesday Night
A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 68.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.11°W (Elev. 98 ft)
3:36 pm EDT Oct 10, 2025
5pm EDT Oct 10, 2025-6pm EDT Oct 17, 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