Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Partly Cloudy

75°F

24°C

Humidity 58%
Wind Speed N 13 G 20 mph
Barometer 29.83 in (1010.0 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 5 Sep 10:56 am EDT
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Today

    Today: Sunny, with a high near 78. North wind 5 to 8 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Scattered showers before 2am.  Mostly cloudy, with a low around 61. Northeast wind around 7 mph.  Chance of precipitation is 30%.

    Low: 61 °F

    Scattered
    Showers

  • Sunday

    Sunday: Sunny, with a high near 73. Northeast wind 5 to 8 mph.

    High: 73 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60. Calm wind becoming north around 6 mph after midnight.

    Low: 60 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 77. Northwest wind around 7 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 78. North wind 5 to 8 mph.
Tonight
Scattered showers before 2am. Mostly cloudy, with a low around 61. Northeast wind around 7 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 73. Northeast wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 60. Calm wind becoming north around 6 mph after midnight.
Labor Day
Sunny, with a high near 77. Northwest wind around 7 mph.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 80.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly cloudy, with a low around 63.
Friday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
2:27 am EDT Sep 5, 2026
11am EDT Sep 5, 2026-6pm EDT Sep 11, 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