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.

Mostly Cloudy

57°F

14°C

Humidity 72%
Wind Speed S 8 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 3 Nov 8:56 am EST
Extended Forecast for

Fort Salonga NY

  • Today

    Today: A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 61. South wind 7 to 10 mph.

    High: 61 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 47. Breezy, with a west wind 13 to 23 mph.

    Low: 47 °F

    Breezy.
    Slight Chance
    Rain then
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. Breezy, with a west wind 17 to 21 mph.

    High: 59 °F

    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. West wind 9 to 11 mph.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 63. Southwest wind 7 to 14 mph.

    High: 63 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 46. Breezy.

    Low: 46 °F

    Mostly Cloudy
    and Breezy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

Detailed Forecast

Today
A 20 percent chance of rain after 4pm. Mostly cloudy, with a high near 61. South wind 7 to 10 mph.
Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 47. Breezy, with a west wind 13 to 23 mph.
Tuesday
Sunny, with a high near 59. Breezy, with a west wind 17 to 21 mph.
Tuesday Night
Mostly clear, with a low around 45. West wind 9 to 11 mph.
Wednesday
Mostly sunny, with a high near 63. Southwest wind 7 to 14 mph.
Wednesday Night
Mostly cloudy, with a low around 46. Breezy.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly clear, with a low around 40.
Friday
Partly sunny, with a high near 61.
Friday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
A 40 percent chance of rain. Partly sunny, with a high near 56.
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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:
8:39 am EST Nov 3, 2025
Forecast Valid:
9am EST Nov 3, 2025-6pm EST Nov 9, 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