Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

76°F

24°C

Humidity 82%
Wind Speed S 7 mph
Barometer 29.99 in (1015.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 19 Jul 11:56 pm EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am.  Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 74. South wind around 8 mph.

    Low: 74 °F

    Chance
    T-storms and
    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 2pm.  Patchy fog before 8am.  Otherwise, mostly cloudy, with a high near 88. Southwest wind 6 to 11 mph.  Chance of precipitation is 40%.

    High: 88 °F

    Chance
    T-storms and
    Patchy Fog

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 72. Northwest wind around 9 mph.

    Low: 72 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85. North wind around 10 mph.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Northeast wind around 10 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 74. South wind around 8 mph.
Sunday
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 88. Southwest wind 6 to 11 mph. Chance of precipitation is 40%.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Northwest wind around 9 mph.
Monday
Sunny, with a high near 85. North wind around 10 mph.
Monday Night
Mostly clear, with a low around 66. Northeast wind around 10 mph.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 75.
Friday
Mostly sunny, with a high near 90.
Friday Night
Mostly cloudy, with a low around 76.
Saturday
Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.81°N 73.11°W (Elev. 98 ft)
3:09 pm EDT Jul 19, 2025
12am EDT Jul 20, 2025-6pm EDT Jul 26, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database