Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

53°F

12°C

Humidity 57%
Wind Speed S 10 mph
Barometer 30.33 in (1027.1 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 10 Apr 11:56 am EDT
Extended Forecast for

Islip NY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 56. South wind 9 to 11 mph.

    High: 56 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after midnight.  Mostly cloudy, with a low around 45. South wind 9 to 13 mph.

    Low: 45 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 60. North wind 8 to 13 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. North wind 3 to 5 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 54. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 56. South wind 9 to 11 mph.
Tonight
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 45. South wind 9 to 13 mph.
Saturday
Sunny, with a high near 60. North wind 8 to 13 mph.
Saturday Night
Mostly clear, with a low around 41. North wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 54. Calm wind becoming south 5 to 8 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Mostly cloudy, with a high near 64.
Monday Night
Mostly cloudy, with a low around 53.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Partly sunny, with a high near 68.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
11:43 am EDT Apr 10, 2026
12pm EDT Apr 10, 2026-6pm EDT Apr 16, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database