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

41°F

5°C

Humidity 55%
Wind Speed SW 9 mph
Barometer 30.03 in (1016.9 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 7 Dec 3:56 pm EST
Extended Forecast for

Bayport NY

  • Tonight

    Tonight: Partly cloudy, with a low around 24. West wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 26 mph.

    Low: 24 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a steady temperature around 28. Wind chill values between 15 and 20. North wind 10 to 15 mph, with gusts as high as 29 mph.

    High: 28 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 17. North wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Increasing clouds, with a high near 42. Wind chill values between 20 and 30. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 42 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow. Mostly cloudy, with a low around 32. Southwest wind 10 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Slight Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 40 percent chance of rain. Mostly cloudy, with a high near 49.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 24. West wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 26 mph.
Monday
Partly sunny, with a steady temperature around 28. Wind chill values between 15 and 20. North wind 10 to 15 mph, with gusts as high as 29 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 17. North wind 3 to 7 mph. Winds could gust as high as 20 mph.
Tuesday
Increasing clouds, with a high near 42. Wind chill values between 20 and 30. Light and variable wind becoming south 5 to 10 mph in the morning.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 32. Southwest wind 10 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 49.
Wednesday Night
A 30 percent chance of rain before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
A 30 percent chance of snow after 1am. Mostly cloudy, with a low around 27.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 38.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 36.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bayport NY
 40.76°N 73.07°W (Elev. 30 ft)
Last Update:
12:47 pm EST Dec 7, 2025
Forecast Valid:
4pm EST Dec 7, 2025-6pm EST Dec 14, 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