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

81°F

27°C

Humidity 79%
Wind Speed S 14 G 21 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 14 Jul 4:56 pm EDT
Extended Forecast for

Bay Shore NY

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 78. South wind around 10 mph.

    High: 78 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm, then showers likely and possibly a thunderstorm after 2am. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 73. South wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    T-storms
    Likely then
    Showers
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 11am. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 81. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Showers
    Likely and
    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 73. Southwest wind 3 to 6 mph.

    Low: 73 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 86 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 30%.

    High: 88 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 78. South wind around 10 mph.
Tonight
Showers and thunderstorms likely, mainly before 11pm, then showers likely and possibly a thunderstorm after 2am. Patchy fog before 2am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 73. South wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms, mainly between 8am and 11am. Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 81. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 73. Southwest wind 3 to 6 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 11am. Otherwise, partly sunny, with a high near 86. Light southwest wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 30%.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 30%.
Thursday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 77. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bay Shore NY
 40.71°N 73.25°W (Elev. 13 ft)
Last Update:
2:29 pm EDT Jul 14, 2025
Forecast Valid:
5pm EDT Jul 14, 2025-6pm EDT Jul 21, 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