Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

82°F

28°C

Humidity 51%
Wind Speed NE 14 mph
Barometer 30.13 in (1020.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 15 Aug 9:56 am EDT
Extended Forecast for

Ronkonkoma NY

  • Today

    Today: Sunny, with a high near 86. Northeast wind around 10 mph becoming southeast in the afternoon.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 67. East wind 3 to 7 mph.

    Low: 67 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 82. Southeast wind 6 to 9 mph.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68. South wind around 6 mph.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86. Southwest wind 7 to 13 mph.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers before 2am.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Northeast wind around 10 mph becoming southeast in the afternoon.
Tonight
Increasing clouds, with a low around 67. East wind 3 to 7 mph.
Saturday
Mostly sunny, with a high near 82. Southeast wind 6 to 9 mph.
Saturday Night
Mostly clear, with a low around 68. South wind around 6 mph.
Sunday
Mostly sunny, with a high near 86. Southwest wind 7 to 13 mph.
Sunday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 79.
Monday Night
Partly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
Partly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Ronkonkoma NY
 40.81°N 73.11°W (Elev. 98 ft)
9:01 am EDT Aug 15, 2025
10am EDT Aug 15, 2025-6pm EDT Aug 21, 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