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

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

76°F

24°C

Humidity 82%
Wind Speed SE 10 mph
Barometer 30.16 in (1021.0 mb)
Dewpoint 70°F (21°C)
Visibility 9.00 mi
Heat Index77°F (25°C)
Last update 15 Aug 7:56 pm EDT
Extended Forecast for

Fort Salonga NY

  • Tonight

    Tonight: Increasing clouds, with a low around 68. East wind 5 to 7 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 84. East wind 3 to 6 mph.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. South wind 6 to 8 mph.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southwest wind 7 to 10 mph.

    High: 88 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 66. South wind 9 to 13 mph becoming north after midnight. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 68. East wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 84. East wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 70. South wind 6 to 8 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Southwest wind 7 to 10 mph.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Partly cloudy, with a low around 66. South wind 9 to 13 mph becoming north after midnight. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 78.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 64.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Salonga NY
 40.92°N 73.3°W (Elev. 26 ft)
Last Update:
1:47 pm EDT Aug 15, 2025
Forecast Valid:
8pm EDT Aug 15, 2025-6pm EDT Aug 22, 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