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

63°F

17°C

Humidity 52%
Wind Speed NE 8 mph
Barometer 30.20 in (1022.6 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 15 Oct 12:56 pm EDT
Extended Forecast for

Fort Salonga NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 61. Northeast wind 3 to 6 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Showers likely, mainly after 5am. Increasing clouds, with a low around 53. Southeast wind 7 to 9 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely before 2pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 72. Southwest wind around 14 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms. Low around 47. Southwest wind 14 to 17 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. Breezy, with a north wind 18 to 22 mph.

    High: 53 °F

    Breezy.
    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 61. Northeast wind 3 to 6 mph.
Tonight
Showers likely, mainly after 5am. Increasing clouds, with a low around 53. Southeast wind 7 to 9 mph. Chance of precipitation is 60%.
Friday
Showers likely before 2pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 72. Southwest wind around 14 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms. Low around 47. Southwest wind 14 to 17 mph becoming northwest after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 53. Breezy, with a north wind 18 to 22 mph.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 49.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Sunny, with a high near 62.
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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:
7:44 am EDT Oct 15, 2026
Forecast Valid:
1pm EDT Oct 15, 2026-6pm EDT Oct 21, 2026
 
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