National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

49°F

9°C

Humidity 71%
Wind Speed W 13 G 25 mph
Barometer 29.77 in (1008.1 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 8 Nov 1:56 am EST
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Overnight

    Overnight: Isolated showers before 4am. Mostly cloudy, with a steady temperature around 48. West wind 15 to 17 mph. Chance of precipitation is 20%.

    Low: 48 °F

    Isolated
    Showers

  • Sunday

    Sunday: Mostly cloudy through mid morning, then gradual clearing, with a high near 62. Breezy, with a west wind 13 to 21 mph, with gusts as high as 31 mph.

    High: 62 °F

    Becoming
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 44. West wind 11 to 16 mph.

    Low: 44 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 58. Breezy, with a northwest wind 14 to 24 mph.

    High: 58 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. Northwest wind 10 to 15 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Overnight
Isolated showers before 4am. Mostly cloudy, with a steady temperature around 48. West wind 15 to 17 mph. Chance of precipitation is 20%.
Sunday
Mostly cloudy through mid morning, then gradual clearing, with a high near 62. Breezy, with a west wind 13 to 21 mph, with gusts as high as 31 mph.
Sunday Night
Mostly clear, with a low around 44. West wind 11 to 16 mph.
Monday
Mostly sunny, with a high near 58. Breezy, with a northwest wind 14 to 24 mph.
Monday Night
Mostly clear, with a low around 43. Northwest wind 10 to 15 mph.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Mostly clear, with a low around 46.
Veterans Day
Sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
A 30 percent chance of rain after 1pm. Partly sunny, with a high near 55.
Thursday Night
Rain likely. Mostly cloudy, with a low around 39. Breezy. Chance of precipitation is 70%.
Friday
A 50 percent chance of rain. Mostly cloudy, with a high near 50. Breezy.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36.
Saturday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
Last Update:
1:44 am EST Nov 8, 2026
Forecast Valid:
2am EST Nov 8, 2026-6pm EST Nov 14, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation