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.

Fair

80°F

27°C

Humidity 69%
Wind Speed N 3 mph
Barometer 30.00 in (1015.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 25 Jun 3:56 am EDT
Extended Forecast for

Fort Salonga NY

Heat Advisory June 25, 04:01am until June 25, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 25, 04:01am until June 25, 07:00pm

    NOW until 7:00pm Wed

    Heat Advisory

  • Today

    High: 95 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Increasing clouds, with a low around 69. North wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers. Mostly cloudy, with a high near 76. East wind 10 to 13 mph.

    High: 76 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 63. East wind 11 to 13 mph.

    Low: 63 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers. Mostly cloudy, with a high near 72. East wind around 13 mph.

    High: 72 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers. Cloudy, with a low around 63.

    Low: 63 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 80.

    High: 80 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 101. Northwest wind 3 to 7 mph.
Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Increasing clouds, with a low around 69. North wind 5 to 7 mph becoming northeast after midnight. Chance of precipitation is 50%.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 76. East wind 10 to 13 mph.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 63. East wind 11 to 13 mph.
Friday
A 20 percent chance of showers. Mostly cloudy, with a high near 72. East wind around 13 mph.
Friday Night
A 40 percent chance of showers. Cloudy, with a low around 63.
Saturday
A 40 percent chance of showers after 2pm. Mostly cloudy, with a high near 80.
Saturday Night
A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 68.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 85.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 71.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Fort Salonga NY
 40.92°N 73.3°W (Elev. 26 ft)
Last Update:
3:46 am EDT Jun 25, 2025
Forecast Valid:
4am EDT Jun 25, 2025-6pm EDT Jul 1, 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