Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog

54°F

12°C

Humidity 100%
Wind Speed S 20 G 30 mph
Barometer 29.78 in (1008.6 mb)
Dewpoint 54°F (12°C)
Visibility 0.50 mi
Wind Chill49°F (9°C)
Last update 16 Mar 9:56 am EDT
Extended Forecast for

Lake Ronkonkoma NY

Wind Advisory March 16, 02:00pm until March 17, 04:00am
Dense Fog Advisory until March 16, 11:00am
Click here for hazard details and duration
Wind Advisory
...
  •  
    Dense Fog Advisory until March 16, 11:00am

    NOW until 11:00am Mon

    Dense Fog Advisory

  • Today

    High: 58 °F

    Showers and
    Areas Fog

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Areas of fog before 2am. Low around 35. Breezy, with a south wind 15 to 23 mph becoming west after midnight. Winds could gust as high as 48 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Showers and
    Areas Fog

  • Tuesday

    Tuesday: Mostly sunny, with a steady temperature around 39. West wind 13 to 15 mph, with gusts as high as 26 mph.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 38. Northwest wind around 6 mph.

    High: 38 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Today
Showers and possibly a thunderstorm. Areas of fog. High near 58. Breezy, with a south wind 17 to 21 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Low around 35. Breezy, with a south wind 15 to 23 mph becoming west after midnight. Winds could gust as high as 48 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a steady temperature around 39. West wind 13 to 15 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 24. Northwest wind 8 to 10 mph, with gusts as high as 21 mph.
Wednesday
Increasing clouds, with a high near 38. Northwest wind around 6 mph.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 50.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 47.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 33.
Sunday
Partly sunny, with a high near 45.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.14°W (Elev. 98 ft)
8:38 am EDT Mar 16, 2026
10am EDT Mar 16, 2026-6pm EDT Mar 22, 2026
 
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Additional Resources

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Hourly Weather Forecast

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