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.

Light Drizzle Fog

65°F

18°C

Humidity 100%
Wind Speed SE 6 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 65°F (18°C)
Visibility 0.13 mi
Last update 17 Jun 11:56 pm EDT
Extended Forecast for

5 Miles SSE Bayport NY

Dense Fog Advisory until June 18, 07:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until June 18, 07:00am

    NOW until 7:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 65 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a slight chance of showers and thunderstorms after 11am. Cloudy, with a high near 71. South wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. South wind around 7 mph.

    Low: 66 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77. Southwest wind 10 to 17 mph.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 67. Breezy, with a west wind 15 to 20 mph.

    Low: 67 °F

    Chance
    T-storms and
    Breezy then
    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Overnight
A slight chance of showers, then a chance of showers and thunderstorms after 2am. Areas of dense fog. Otherwise, cloudy, with a low around 65. South wind around 6 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 11am, then a slight chance of showers and thunderstorms after 11am. Cloudy, with a high near 71. South wind 6 to 8 mph. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. South wind around 7 mph.
Juneteenth
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 77. Southwest wind 10 to 17 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 67. Breezy, with a west wind 15 to 20 mph.
Friday
Sunny, with a high near 75.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Bayport NY
 40.68°N 73.02°W (Elev. 0 ft)
Last Update:
9:55 pm EDT Jun 17, 2025
Forecast Valid:
12am EDT Jun 18, 2025-6pm EDT Jun 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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