Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast and Breezy

54°F

12°C

Humidity 93%
Wind Speed S 21 G 32 mph
Barometer 29.65 in (1004.1 mb)
Dewpoint 52°F (11°C)
Visibility 7.00 mi
Wind Chill49°F (9°C)
Last update 16 Mar 2:56 pm EDT
Extended Forecast for

2 Miles NNW Stony Brook NY

Wind Advisory until March 17, 04:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until March 17, 04:00am

    NOW until 4:00am Tue

    Wind Advisory

  • This Afternoon

    High: 59 °F

    Showers and
    Areas Fog

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Areas of fog before 2am. Low around 35. Windy, with a south wind 23 to 31 mph becoming west after midnight. Winds could gust as high as 49 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Showers and
    Areas Fog

  • Tuesday

    Tuesday: Sunny, with a high near 43. Wind chill values between 25 and 35. West wind around 18 mph.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 26. Wind chill values between 20 and 25. West wind 13 to 15 mph.

    Low: 26 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. Northwest wind 5 to 8 mph.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Areas of fog. High near 59. Breezy, with a south wind around 23 mph, with gusts as high as 38 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Low around 35. Windy, with a south wind 23 to 31 mph becoming west after midnight. Winds could gust as high as 49 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Sunny, with a high near 43. Wind chill values between 25 and 35. West wind around 18 mph.
Tuesday Night
Partly cloudy, with a low around 26. Wind chill values between 20 and 25. West wind 13 to 15 mph.
Wednesday
Mostly sunny, with a high near 38. Northwest wind 5 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
Mostly sunny, with a high near 50.
Friday Night
A 50 percent chance of rain after 8pm. Mostly cloudy, with a low around 37.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 49.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 35.
Sunday
Mostly cloudy, with a high near 47.
Sunday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 33.
Monday
Mostly sunny, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
3:44 pm EDT Mar 16, 2026
3pm EDT Mar 16, 2026-6pm EDT Mar 23, 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