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

30°F

-1°C

Humidity 75%
Wind Speed NE 13 mph
Barometer 30.08 in (1018.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 27 Dec 12:56 pm EST
Extended Forecast for

Bay Shore NY

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 31. Wind chill values between 25 and 30. North wind 9 to 13 mph.

    High: 31 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 21. North wind 3 to 5 mph.

    Low: 21 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after 4pm. Increasing clouds, with a high near 44. Wind chill values between 20 and 30. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 44 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain, mainly after 7pm. Temperature rising to around 43 by 2am. South wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F⇑

    Rain

  • Monday

    Monday: Rain. High near 51. Southwest wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 26. Breezy.

    Low: 26 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 34. Breezy.

    High: 34 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 25. Breezy.

    Low: 25 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 31. Wind chill values between 25 and 30. North wind 9 to 13 mph.
Tonight
Partly cloudy, with a low around 21. North wind 3 to 5 mph.
Sunday
A 20 percent chance of rain after 4pm. Increasing clouds, with a high near 44. Wind chill values between 20 and 30. Light and variable wind becoming west 5 to 7 mph in the morning.
Sunday Night
Rain, mainly after 7pm. Temperature rising to around 43 by 2am. South wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Rain. High near 51. Southwest wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly cloudy, with a low around 26. Breezy.
Tuesday
Mostly cloudy, with a high near 34. Breezy.
Tuesday Night
Mostly cloudy, with a low around 25. Breezy.
Wednesday
Mostly sunny, with a high near 36.
Wednesday Night
Partly cloudy, with a low around 26.
New Year's Day
A 30 percent chance of snow. Mostly cloudy, with a high near 36.
Thursday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 19.
Friday
Mostly sunny, with a high near 31.
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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:
12:59 pm EST Dec 27, 2025
Forecast Valid:
1pm EST Dec 27, 2025-6pm EST Jan 2, 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