Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

36°F

2°C

Humidity 64%
Wind Speed NE 15 G 20 mph
Barometer 30.10 in (1019.4 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 16 Feb 12:56 pm EST
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 37. Northeast wind 7 to 13 mph.

    High: 37 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of freezing rain after 4am.  Increasing clouds, with a low around 29. Calm wind.  Chance of precipitation is 20%.

    Low: 29 °F

    Partly Cloudy
    then Slight
    Chance
    Freezing Rain

  • Tuesday

    Tuesday: A slight chance of freezing rain before 10am.  Cloudy, then gradually becoming mostly sunny, with a high near 40. South wind 5 to 9 mph.  Chance of precipitation is 20%.

    High: 40 °F

    Slight Chance
    Freezing Rain
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 32. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 32 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Rain.  High near 40. Calm wind becoming northeast 5 to 8 mph in the morning.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 40 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 1am.  Mostly cloudy, with a low around 34. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Rain Likely

  • Thursday

    Thursday: Mostly cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of rain and snow after 1am.  Mostly cloudy, with a low around 31. Chance of precipitation is 30%.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Friday

    Friday: A chance of rain and snow before 1pm, then rain likely.  Cloudy, with a high near 39. Chance of precipitation is 70%.

    High: 39 °F

    Rain/Snow
    Likely

Detailed Forecast

Washington's Birthday
Partly sunny, with a high near 37. Northeast wind 7 to 13 mph.
Tonight
A slight chance of freezing rain after 4am. Increasing clouds, with a low around 29. Calm wind. Chance of precipitation is 20%.
Tuesday
A slight chance of freezing rain before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 40. South wind 5 to 9 mph. Chance of precipitation is 20%.
Tuesday Night
Increasing clouds, with a low around 32. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Rain. High near 40. Calm wind becoming northeast 5 to 8 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain likely before 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly cloudy, with a high near 40.
Thursday Night
A chance of rain and snow after 1am. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Friday
A chance of rain and snow before 1pm, then rain likely. Cloudy, with a high near 39. Chance of precipitation is 70%.
Friday Night
A chance of rain and snow. Cloudy, with a low around 33. Chance of precipitation is 50%.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 40.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
A chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
1:52 pm EST Feb 16, 2026
1pm EST Feb 16, 2026-6pm EST Feb 22, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database