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.

Overcast

45°F

7°C

Humidity 71%
Wind Speed S 17 G 28 mph
Barometer 29.83 in (1010.3 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 20 Mar 6:56 pm EDT
Extended Forecast for

Bay Shore NY

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 1am, then showers likely. Patchy fog after 3am. Steady temperature around 45. Southwest wind 9 to 16 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers then
    Showers
    Likely and
    Patchy Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 56. North wind 7 to 11 mph.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. Light and variable wind.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 55. South wind 6 to 11 mph.

    High: 55 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely, mainly after 8pm. Cloudy, with a low around 41. South wind around 8 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Rain Likely

  • Monday

    Monday: A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 44.

    High: 44 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 1am, then showers likely. Patchy fog after 3am. Steady temperature around 45. Southwest wind 9 to 16 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 56. North wind 7 to 11 mph.
Saturday Night
Increasing clouds, with a low around 39. Light and variable wind.
Sunday
A 20 percent chance of rain after 2pm. Mostly cloudy, with a high near 55. South wind 6 to 11 mph.
Sunday Night
Rain likely, mainly after 8pm. Cloudy, with a low around 41. South wind around 8 mph becoming north after midnight. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Monday
A 40 percent chance of rain before 2pm. Mostly cloudy, with a high near 48.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Sunny, with a high near 44.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Partly sunny, with a high near 48.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 50.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 50.
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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:
3:15 pm EDT Mar 20, 2026
Forecast Valid:
7pm EDT Mar 20, 2026-6pm EDT Mar 27, 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