Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

80°F

27°C

Humidity 56%
Wind Speed SE 12 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 5 Aug 4:56 pm EDT
Extended Forecast for

Central Islip NY

  • Tonight

    Tonight: Widespread haze. Mostly cloudy, with a low around 67. Southeast wind around 6 mph becoming light and variable.

    Low: 67 °F

    Haze

  • Wednesday

    Wednesday: Widespread haze before 2pm. Mostly cloudy, with a high near 81. East wind 6 to 10 mph.

    High: 81 °F

    Haze

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 66. East wind around 6 mph.

    Low: 66 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. East wind 6 to 10 mph.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63. East wind 3 to 6 mph.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

Tonight
Widespread haze. Mostly cloudy, with a low around 67. Southeast wind around 6 mph becoming light and variable.
Wednesday
Widespread haze before 2pm. Mostly cloudy, with a high near 81. East wind 6 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 66. East wind around 6 mph.
Thursday
Mostly sunny, with a high near 80. East wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 63. East wind 3 to 6 mph.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 85.
Sunday Night
Partly cloudy, with a low around 70.
Monday
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Central Islip NY
 40.79°N 73.2°W (Elev. 98 ft)
1:45 pm EDT Aug 5, 2025
5pm EDT Aug 5, 2025-6pm EDT Aug 12, 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