Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

41°F

5°C

Humidity 89%
Wind Speed E 5 mph
Barometer 30.08 in (1018.8 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 7 Apr 1:56 am EDT
Extended Forecast for

Islip, Long Island Mac Arthur Airport NY

  • Overnight

    Overnight: A 30 percent chance of showers.  Mostly cloudy, with a low around 39. Light southeast wind.

    Low: 39 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers before 8am, then a slight chance of showers after 2pm.  Mostly sunny, with a high near 52. Northwest wind 8 to 16 mph, with gusts as high as 26 mph.  Chance of precipitation is 20%.

    High: 52 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 30. Wind chill values between 20 and 25. North wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 30 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 47. Wind chill values between 20 and 30 early. North wind 7 to 9 mph becoming east in the afternoon.

    High: 47 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 33. Southeast wind around 6 mph becoming calm  in the evening.

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers. Mostly cloudy, with a low around 39. Light southeast wind.
Tuesday
A slight chance of showers before 8am, then a slight chance of showers after 2pm. Mostly sunny, with a high near 52. Northwest wind 8 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 30. Wind chill values between 20 and 25. North wind 11 to 13 mph, with gusts as high as 23 mph.
Wednesday
Sunny, with a high near 47. Wind chill values between 20 and 30 early. North wind 7 to 9 mph becoming east in the afternoon.
Wednesday Night
Mostly clear, with a low around 33. Southeast wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 50.
Thursday Night
Partly cloudy, with a low around 41.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 64.
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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)
8:00 pm EDT Apr 6, 2026
2am EDT Apr 7, 2026-6pm EDT Apr 13, 2026
 
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Additional Resources

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