Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog

53°F

12°C

Humidity 96%
Wind Speed S 16 G 36 mph
Barometer 29.69 in (1005.3 mb)
Dewpoint 52°F (11°C)
Visibility 0.13 mi
Wind Chill48°F (9°C)
Last update 16 Mar 1:56 pm EDT
Extended Forecast for

Lake Ronkonkoma NY

Wind Advisory until March 17, 04:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until March 17, 04:00am

    NOW until 4:00am Tue

    Wind Advisory

  • This Afternoon

    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 34. Breezy, with a south wind 17 to 23 mph becoming west after midnight. Winds could gust as high as 50 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Showers and
    Areas Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. West wind around 14 mph, with gusts as high as 26 mph.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. Northwest wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 37. Northwest wind around 6 mph.

    High: 37 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 28 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Areas of fog. High near 58. Breezy, with a south wind around 20 mph, with gusts as high as 39 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Low around 34. Breezy, with a south wind 17 to 23 mph becoming west after midnight. Winds could gust as high as 50 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a high near 42. West wind around 14 mph, with gusts as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 24. Northwest wind 7 to 10 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 37. Northwest wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 50.
Friday Night
A 40 percent chance of rain after 2am. Mostly cloudy, with a low around 36.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 48.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 34.
Sunday
Mostly cloudy, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
Lake Ronkonkoma NY
 40.83°N 73.14°W (Elev. 98 ft)
1:51 pm EDT Mar 16, 2026
2pm EDT Mar 16, 2026-6pm EDT Mar 22, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database