Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

45°F

7°C

Humidity 48%
Wind Speed N 9 mph
Barometer 30.40 in (1029.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 12 Apr 12:56 am EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: Patchy frost after 5am.  Otherwise, clear, with a low around 37. North wind 5 to 7 mph becoming calm.

    Low: 37 °F

    Patchy Frost

  • Sunday

    Sunday: Patchy frost before 7am.  Otherwise, increasing clouds, with a high near 54. Northeast wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.

    High: 54 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44. South wind around 11 mph.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 65. Breezy, with a southwest wind 11 to 20 mph.

    High: 65 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Monday Night

    Monday Night: A 20 percent chance of showers before 2am.  Mostly cloudy, with a low around 54. West wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 54 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy frost after 5am. Otherwise, clear, with a low around 37. North wind 5 to 7 mph becoming calm.
Sunday
Patchy frost before 7am. Otherwise, increasing clouds, with a high near 54. Northeast wind 6 to 11 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 44. South wind around 11 mph.
Monday
Partly sunny, with a high near 65. Breezy, with a southwest wind 11 to 20 mph.
Monday Night
A 20 percent chance of showers before 2am. Mostly cloudy, with a low around 54. West wind 6 to 14 mph, with gusts as high as 24 mph.
Tuesday
Partly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Mostly cloudy, with a low around 56.
Thursday
Partly sunny, with a high near 72.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 66.
Friday Night
Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip, Long Island Mac Arthur Airport NY
 40.78°N 73.09°W (Elev. 49 ft)
6:36 pm EDT Apr 11, 2026
1am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
 
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Additional Resources

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