Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

60°F

16°C

Humidity 84%
Wind Speed W 9 mph
Barometer 29.96 in (1014.6 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 5 Oct 8:56 am EDT
Extended Forecast for

Ronkonkoma NY

  • Today

    Today: Mostly sunny, with a high near 72. Northwest wind 8 to 18 mph, with gusts as high as 30 mph.

    High: 72 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. Northwest wind around 11 mph, with gusts as high as 26 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. Northwest wind 9 to 15 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 42. Northwest wind around 6 mph becoming calm  after midnight.

    Low: 42 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 65. Light southwest wind increasing to 10 to 15 mph in the morning.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 72. Northwest wind 8 to 18 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 45. Northwest wind around 11 mph, with gusts as high as 26 mph.
Tuesday
Sunny, with a high near 64. Northwest wind 9 to 15 mph.
Tuesday Night
Clear, with a low around 42. Northwest wind around 6 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 65. Light southwest wind increasing to 10 to 15 mph in the morning.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 55.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Ronkonkoma NY
 40.81°N 73.11°W (Elev. 98 ft)
9:10 am EDT Oct 5, 2026
9am EDT Oct 5, 2026-6pm EDT Oct 11, 2026
 
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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