Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

41°F

5°C

Humidity 70%
Wind Speed S 10 mph
Barometer 30.62 in (1037.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 9 Apr 8:56 am EDT
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Today

    Today: Mostly sunny, with a high near 50. South wind 5 to 13 mph.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 4am and 5am.  Otherwise, partly cloudy, with a low around 38. Southwest wind 3 to 8 mph.

    Low: 38 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Mostly sunny, with a high near 58. Southwest wind 5 to 11 mph.

    High: 58 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43. South wind 9 to 11 mph.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 60. Northwest wind 9 to 11 mph.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 50. South wind 5 to 13 mph.
Tonight
Patchy fog between 4am and 5am. Otherwise, partly cloudy, with a low around 38. Southwest wind 3 to 8 mph.
Friday
Mostly sunny, with a high near 58. Southwest wind 5 to 11 mph.
Friday Night
Mostly cloudy, with a low around 43. South wind 9 to 11 mph.
Saturday
Sunny, with a high near 60. Northwest wind 9 to 11 mph.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Mostly sunny, with a high near 56.
Sunday Night
Mostly cloudy, with a low around 46.
Monday
Mostly cloudy, with a high near 66.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Partly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
6:37 am EDT Apr 9, 2026
9am EDT Apr 9, 2026-6pm EDT Apr 15, 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