National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

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 49%
Wind Speed W 5 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 12 Jun 8:56 pm EDT
Extended Forecast for

Islip NYSimilar City Names

  • Tonight

    Tonight: Mostly cloudy, with a low around 64. West wind around 5 mph becoming light and variable after midnight.

    Low: 64 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77. Northeast wind 5 to 9 mph becoming southeast in the afternoon.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind around 6 mph.

    Low: 61 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 71. Northeast wind 7 to 11 mph.

    High: 71 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of showers, mainly before 2am. Cloudy, with a low around 57. East wind around 8 mph.

    Low: 57 °F

    Chance
    Showers

  • Sunday

    Sunday: Mostly cloudy, with a high near 69.

    High: 69 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 64. West wind around 5 mph becoming light and variable after midnight.
Friday
Partly sunny, with a high near 77. Northeast wind 5 to 9 mph becoming southeast in the afternoon.
Friday Night
A 50 percent chance of showers, mainly after 2am. Mostly cloudy, with a low around 61. East wind around 6 mph.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 71. Northeast wind 7 to 11 mph.
Saturday Night
A 30 percent chance of showers, mainly before 2am. Cloudy, with a low around 57. East wind around 8 mph.
Sunday
Mostly cloudy, with a high near 69.
Sunday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 58.
Monday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 61.
Tuesday
Mostly cloudy, with a high near 76.
Tuesday Night
Mostly cloudy, with a low around 63.
Wednesday
Partly sunny, with a high near 77.
Wednesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Juneteenth
A 30 percent chance of showers. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NYSimilar City Names
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
7:35 pm EDT Jun 12, 2025
Forecast Valid:
9pm EDT Jun 12, 2025-6pm EDT Jun 19, 2025
 
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Additional Resources

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Chance of Precipitation