Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

80°F

27°C

Humidity 41%
Wind Speed NW 8 mph
Barometer 30.06 in (1017.6 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 18 Jul 6:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Light north wind.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 83. Light and variable wind becoming south 5 to 8 mph in the morning.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 11pm.  Increasing clouds, with a low around 72. South wind around 7 mph.  Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86. Southwest wind 6 to 9 mph.

    High: 86 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69. North wind around 7 mph.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

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

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. Light north wind.
Saturday
Sunny, with a high near 83. Light and variable wind becoming south 5 to 8 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 11pm. Increasing clouds, with a low around 72. South wind around 7 mph. Chance of precipitation is 50%.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 69. North wind around 7 mph.
Monday
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 65.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Partly sunny, with a high near 88.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 74.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.8°N 73.09°W (Elev. 98 ft)
1:40 pm EDT Jul 18, 2025
7pm EDT Jul 18, 2025-6pm EDT Jul 25, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database