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 Rain Fog/Mist

63°F

17°C

Humidity 93%
Wind Speed NE 13 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 61°F (16°C)
Visibility 5.00 mi
Last update 20 Aug 11:56 pm EDT
Extended Forecast for

Fort Salonga NY

Coastal Flood Advisory August 21, 08:00pm until August 22, 01:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Overnight

    Overnight: Rain likely and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms after 2am. Cloudy, with a low around 62. Northeast wind around 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Rain Likely

  • Thursday

    Thursday: A chance of rain and thunderstorms before 8am, then a chance of showers between 8am and 11am. Mostly cloudy, with a high near 75. Breezy, with a northeast wind 18 to 20 mph. Chance of precipitation is 30%.

    High: 75 °F

    Breezy.
    Chance
    Showers then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 61. Breezy, with a north wind 18 to 20 mph.

    Low: 61 °F

    Decreasing
    Clouds and
    Breezy

  • Friday

    Friday: Sunny, with a high near 84. North wind 7 to 14 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66. Southwest wind around 7 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Sunday

    Sunday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.

    Low: 68 °F

    Showers
    Likely

Detailed Forecast

Overnight
Rain likely and possibly a thunderstorm before 2am, then a chance of rain and thunderstorms after 2am. Cloudy, with a low around 62. Northeast wind around 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of rain and thunderstorms before 8am, then a chance of showers between 8am and 11am. Mostly cloudy, with a high near 75. Breezy, with a northeast wind 18 to 20 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 61. Breezy, with a north wind 18 to 20 mph.
Friday
Sunny, with a high near 84. North wind 7 to 14 mph.
Friday Night
Mostly clear, with a low around 66. Southwest wind around 7 mph.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 68.
Sunday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 82.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Monday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 64.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 80.
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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:
6:19 pm EDT Aug 20, 2025
Forecast Valid:
12am EDT Aug 21, 2025-6pm EDT Aug 27, 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