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

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog

44°F

7°C

Humidity 96%
Wind Speed SW 12 mph
Barometer 29.77 in (1008.0 mb)
Dewpoint 43°F (6°C)
Visibility 0.25 mi
Wind Chill38°F (3°C)
Last update 8 Mar 3:56 am EDT
Extended Forecast for

2 Miles NNW Stony Brook NY

Dense Fog Advisory March 8, 04:07am until March 8, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 8, 04:07am until March 8, 09:00am

    NOW until 9:00am Sun

    Dense Fog Advisory

  • Overnight

    Low: 46 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 11am. Areas of dense fog before 11am. Otherwise, mostly cloudy, with a high near 59. Southwest wind around 11 mph.

    High: 59 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. West wind around 7 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 58. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Southwest wind 5 to 8 mph.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 55.

    High: 55 °F

    Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers. Areas of dense fog. Otherwise, cloudy, with a steady temperature around 46. Southwest wind around 10 mph.
Sunday
A 30 percent chance of showers, mainly before 11am. Areas of dense fog before 11am. Otherwise, mostly cloudy, with a high near 59. Southwest wind around 11 mph.
Sunday Night
Partly cloudy, with a low around 40. West wind around 7 mph.
Monday
Sunny, with a high near 58. Light southwest wind increasing to 5 to 10 mph in the morning.
Monday Night
Mostly clear, with a low around 40. Southwest wind 5 to 8 mph.
Tuesday
Mostly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
Cloudy, with a high near 55.
Wednesday Night
A 40 percent chance of showers after 2am. Cloudy, with a low around 46.
Thursday
Showers likely, mainly after 8am. Cloudy, with a high near 53. Chance of precipitation is 70%.
Thursday Night
Partly cloudy, with a low around 31.
Friday
Mostly sunny, with a high near 45.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 37.
Saturday
Mostly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
Last Update:
12:47 am EST Mar 8, 2026
Forecast Valid:
4am EDT Mar 8, 2026-6pm EDT Mar 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