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.

Mostly Cloudy

67°F

19°C

Humidity 79%
Wind Speed S 9 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 6 May 12:56 pm EDT
Extended Forecast for

Stony Brook NY

  • This Afternoon

    This Afternoon: A 20 percent chance of showers after 2pm. Cloudy, with a high near 68. Light southwest wind.

    High: 68 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 56. Light and variable wind becoming northwest around 6 mph after midnight. Chance of precipitation is 20%.

    Low: 56 °F

    Cloudy then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 74. North wind 7 to 9 mph becoming east in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers after 2am. Increasing clouds, with a low around 54. South wind around 8 mph.

    Low: 54 °F

    Partly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 2pm, then a slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 75. South wind around 10 mph. Chance of precipitation is 40%.

    High: 75 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers. Mostly cloudy, with a high near 61.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A 20 percent chance of showers after 2pm. Cloudy, with a high near 68. Light southwest wind.
Tonight
A slight chance of showers before 8pm, then a slight chance of showers after 2am. Mostly cloudy, with a low around 56. Light and variable wind becoming northwest around 6 mph after midnight. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 74. North wind 7 to 9 mph becoming east in the afternoon.
Tuesday Night
A 50 percent chance of showers after 2am. Increasing clouds, with a low around 54. South wind around 8 mph.
Wednesday
A chance of showers and thunderstorms before 2pm, then a slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 75. South wind around 10 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Thursday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 61.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 66.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Stony Brook NY
 40.92°N 73.12°W (Elev. 112 ft)
Last Update:
1:03 pm EDT May 6, 2024
Forecast Valid:
1pm EDT May 6, 2024-6pm EDT May 12, 2024
 
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