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

65°F

18°C

Humidity 100%
Wind Speed S 3 mph
Barometer 29.96 in (1014.3 mb)
Dewpoint 65°F (18°C)
Visibility 0.25 mi
Last update 18 Jun 4:56 am EDT
Extended Forecast for

5 Miles SSE Blue Point 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
    Dense Fog

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm. Widespread dense fog, mainly before 7am. Otherwise, cloudy, with a high near 70. South wind around 8 mph. Chance of precipitation is 30%.

    High: 70 °F

    Chance
    Showers and
    Dense Fog

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 66. South wind around 7 mph becoming southwest after midnight.

    Low: 66 °F

    Chance
    Showers then
    Mostly Cloudy

  • Juneteenth

    Juneteenth: A 30 percent chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Partly sunny, with a high near 74. Southwest wind 9 to 16 mph.

    High: 74 °F

    Partly Sunny
    then Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 65. Southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.

    Low: 65 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

Overnight
A 40 percent chance of showers. Widespread dense fog. Otherwise, cloudy, with a low around 65. South wind around 6 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Widespread dense fog, mainly before 7am. Otherwise, cloudy, with a high near 70. South wind around 8 mph. Chance of precipitation is 30%.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 66. South wind around 7 mph becoming southwest after midnight.
Juneteenth
A 30 percent chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Partly sunny, with a high near 74. Southwest wind 9 to 16 mph.
Thursday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 65. Southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 40%.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Blue Point NY
 40.68°N 72.99°W (Elev. 0 ft)
Last Update:
3:06 am EDT Jun 18, 2025
Forecast Valid:
5am EDT Jun 18, 2025-6pm EDT Jun 24, 2025
 
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