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.

Partly Cloudy

68°F

20°C

Humidity 73%
Wind Speed N 6 mph
Barometer 30.09 in (1018.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 18 Sep 10:56 pm EDT
Extended Forecast for

Fort Salonga NY

  • Tonight

    Tonight: Partly cloudy, with a low around 59. Northeast wind 10 to 15 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68. Northeast wind 7 to 14 mph.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 58. Southeast wind 7 to 9 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 70. Southeast wind 8 to 14 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 61. South wind 6 to 11 mph becoming north after midnight. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Low: 61 °F

    Showers

  • Monday

    Monday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers after 8am. Mostly cloudy, with a high near 64. Breezy.

    High: 64 °F

    Chance
    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 55. Breezy.

    Low: 55 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. Northeast wind 10 to 15 mph.
Saturday
Mostly sunny, with a high near 68. Northeast wind 7 to 14 mph.
Saturday Night
Partly cloudy, with a low around 58. Southeast wind 7 to 9 mph.
Sunday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 70. Southeast wind 8 to 14 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 61. South wind 6 to 11 mph becoming north after midnight. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Monday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 67. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Monday Night
A 30 percent chance of showers before 2am. Mostly cloudy, with a low around 56.
Tuesday
A 30 percent chance of showers after 8am. Mostly cloudy, with a high near 64. Breezy.
Tuesday Night
Mostly cloudy, with a low around 55. Breezy.
Wednesday
Mostly cloudy, with a high near 64. Breezy.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55. Breezy.
Thursday
A 30 percent chance of showers. Mostly cloudy, with a high near 63. Breezy.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 54. Breezy.
Friday
A 30 percent chance of showers. Partly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Salonga NY
 40.91°N 73.27°W (Elev. 49 ft)
Last Update:
3:10 pm EDT Sep 18, 2026
Forecast Valid:
11pm EDT Sep 18, 2026-6pm EDT Sep 25, 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