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.

Fog/Mist

36°F

2°C

Humidity 93%
Wind Speed W 9 mph
Barometer 29.88 in (1011.9 mb)
Dewpoint 34°F (1°C)
Visibility 5.00 mi
Wind Chill29°F (-2°C)
Last update 24 Dec 2:56 am EST
Extended Forecast for

Bayport NY

  • Overnight

    Overnight: Partly cloudy, with a low around 33. West wind around 9 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 43. Northwest wind 13 to 17 mph, with gusts as high as 32 mph.

    High: 43 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 27. North wind around 6 mph becoming calm in the evening.

    Low: 27 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Southwest wind 6 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 43 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20. North wind around 10 mph, with gusts as high as 23 mph.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

  • Friday Night

    Friday Night: Snow. Low around 23. Chance of precipitation is 90%.

    Low: 23 °F

    Snow

  • Saturday

    Saturday: Snow likely before 1pm. Cloudy, with a high near 35. Chance of precipitation is 60%.

    High: 35 °F

    Snow Likely

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 33. West wind around 9 mph, with gusts as high as 24 mph.
Wednesday
Sunny, with a high near 43. Northwest wind 13 to 17 mph, with gusts as high as 32 mph.
Wednesday Night
Increasing clouds, with a low around 27. North wind around 6 mph becoming calm in the evening.
Christmas Day
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 43. Southwest wind 6 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 20. North wind around 10 mph, with gusts as high as 23 mph.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 30.
Friday Night
Snow. Low around 23. Chance of precipitation is 90%.
Saturday
Snow likely before 1pm. Cloudy, with a high near 35. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Rain likely, mainly after 1pm. Cloudy, with a high near 44. Chance of precipitation is 60%.
Sunday Night
Rain. Low around 28. Chance of precipitation is 80%.
Monday
A 40 percent chance of rain. Partly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Partly sunny, with a high near 31.
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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:
1:22 am EST Dec 24, 2025
Forecast Valid:
3am EST Dec 24, 2025-6pm EST Dec 30, 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