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

33°F

1°C

Humidity 92%
Wind Speed W 9 mph
Barometer 29.93 in (1013.6 mb)
Dewpoint 31°F (-1°C)
Visibility 9.00 mi
Wind Chill25°F (-4°C)
Last update 12 Mar 8:56 pm EDT
Extended Forecast for

Bay Shore NY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 30. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 46. West wind 5 to 15 mph becoming south in the afternoon.

    High: 46 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind around 15 mph, with gusts as high as 34 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 49. West wind 16 to 18 mph, with gusts as high as 33 mph.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 33. Northwest wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 33 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Mostly cloudy, with a high near 48.

    High: 48 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 40. Chance of precipitation is 80%.

    Low: 40 °F

    Chance Rain
    then Rain

  • Monday

    Monday: Rain and possibly a thunderstorm. High near 55. Breezy. Chance of precipitation is 100%.

    High: 55 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Rain, mainly before 2am. Low around 34. Breezy. Chance of precipitation is 80%.

    Low: 34 °F

    Rain and
    Breezy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 30. West wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
Increasing clouds, with a high near 46. West wind 5 to 15 mph becoming south in the afternoon.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. South wind around 15 mph, with gusts as high as 34 mph.
Saturday
Sunny, with a high near 49. West wind 16 to 18 mph, with gusts as high as 33 mph.
Saturday Night
Increasing clouds, with a low around 33. Northwest wind 5 to 9 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly cloudy, with a high near 48.
Sunday Night
Rain, mainly after 2am. Low around 40. Chance of precipitation is 80%.
Monday
Rain and possibly a thunderstorm. High near 55. Breezy. Chance of precipitation is 100%.
Monday Night
Rain, mainly before 2am. Low around 34. Breezy. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of rain before 8am. Mostly sunny, with a high near 44.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Sunny, with a high near 38.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bay Shore NY
 40.71°N 73.25°W (Elev. 13 ft)
Last Update:
6:03 pm EDT Mar 12, 2026
Forecast Valid:
9pm EDT Mar 12, 2026-6pm EDT Mar 19, 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