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.

Light Rain

70°F

21°C

Humidity 87%
Wind Speed S 7 G 20 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 22 Jun 4:56 pm EDT
Extended Forecast for

Fort Salonga NY

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Steady temperature around 76. Southeast wind around 11 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 66. South wind 9 to 13 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers

  • Tuesday

    Tuesday: Showers and thunderstorms likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers after 2pm. Mostly cloudy, with a high near 78. Southwest wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 64. Northwest wind 6 to 9 mph.

    Low: 64 °F

    Chance
    Showers then
    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 86. Northwest wind around 7 mph.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 60%.

    High: 84 °F

    Showers
    Likely then
    Chance
    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Steady temperature around 76. Southeast wind around 11 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Low around 66. South wind 9 to 13 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers and thunderstorms likely before 11am, then showers likely and possibly a thunderstorm between 11am and 2pm, then a chance of showers after 2pm. Mostly cloudy, with a high near 78. Southwest wind 5 to 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
A 30 percent chance of showers, mainly before 8pm. Cloudy during the early evening, then gradual clearing, with a low around 64. Northwest wind 6 to 9 mph.
Wednesday
Sunny, with a high near 86. Northwest wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 86.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 68.
Saturday
A 50 percent chance of showers. Partly sunny, with a high near 83.
Saturday Night
A 30 percent chance of showers. Partly cloudy, with a low around 68.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 68.
Monday
Mostly sunny, with a high near 87.
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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:
2:30 pm EDT Jun 22, 2026
Forecast Valid:
5pm EDT Jun 22, 2026-6pm EDT Jun 29, 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