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.

Mostly Cloudy

81°F

27°C

Humidity 74%
Wind Speed S 14 G 23 mph
Barometer 29.95 in (1014.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 2 Aug 1:56 pm EDT
Extended Forecast for

Fort Salonga NY

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 83. South wind around 13 mph.

    High: 83 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 72. South wind 8 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Chance
    T-storms then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 81. South wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    High: 81 °F

    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 66. Southwest wind around 9 mph becoming north after midnight.

    Low: 66 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. North wind around 7 mph becoming south in the afternoon.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

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

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 83. South wind around 13 mph.
Tonight
A slight chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then showers and possibly a thunderstorm after 2am. Low around 72. South wind 8 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm. High near 81. South wind around 15 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Monday Night
A 30 percent chance of showers before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 66. Southwest wind around 9 mph becoming north after midnight.
Tuesday
Mostly sunny, with a high near 83. North wind around 7 mph becoming south in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 67.
Wednesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 82.
Wednesday Night
A 30 percent chance of showers before 8pm. Mostly cloudy, with a low around 71.
Thursday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 86.
Thursday Night
A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 40%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Saturday
A 40 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fort Salonga NY
 40.9°N 73.3°W (Elev. 135 ft)
Last Update:
2:30 pm EDT Aug 2, 2026
Forecast Valid:
2pm EDT Aug 2, 2026-6pm EDT Aug 8, 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