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

45°F

7°C

Humidity 46%
Wind Speed NW 12 mph
Barometer 29.71 in
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 11 Jan 1:56 pm EST
Extended Forecast for

5 Miles SSE Bayport NY

  • This Afternoon

    This Afternoon: A 30 percent chance of showers after 4pm. Mostly sunny, with a high near 44. Breezy, with a west wind 17 to 20 mph.

    High: 44 °F

    Chance
    Showers and
    Breezy

  • Tonight

    Tonight: A 30 percent chance of showers before 7pm. Partly cloudy, with a low around 32. Wind chill values between 20 and 30. Windy, with a west wind 26 to 31 mph, with gusts as high as 43 mph.

    Low: 32 °F

    Windy. Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 40. Wind chill values between 20 and 30. Breezy, with a west wind 18 to 23 mph.

    High: 40 °F

    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35. Breezy, with a west wind 14 to 20 mph.

    Low: 35 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 43. Southwest wind 13 to 15 mph.

    High: 43 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41. Breezy.

    Low: 41 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain after 1am. Cloudy, with a low around 37.

    Low: 37 °F

    Cloudy then
    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain. Mostly cloudy, with a high near 42.

    High: 42 °F

    Chance Rain

Detailed Forecast

This Afternoon
A 30 percent chance of showers after 4pm. Mostly sunny, with a high near 44. Breezy, with a west wind 17 to 20 mph.
Tonight
A 30 percent chance of showers before 7pm. Partly cloudy, with a low around 32. Wind chill values between 20 and 30. Windy, with a west wind 26 to 31 mph, with gusts as high as 43 mph.
Monday
Mostly sunny, with a high near 40. Wind chill values between 20 and 30. Breezy, with a west wind 18 to 23 mph.
Monday Night
Partly cloudy, with a low around 35. Breezy, with a west wind 14 to 20 mph.
Tuesday
Sunny, with a high near 43. Southwest wind 13 to 15 mph.
Tuesday Night
Mostly cloudy, with a low around 41. Breezy.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
A 30 percent chance of rain after 1am. Cloudy, with a low around 37.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 42.
Thursday Night
A chance of rain before 1am, then a chance of snow. Mostly cloudy, with a low around 26. Blustery. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 34. Breezy.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSE Bayport NY
 40.68°N 73.02°W (Elev. 0 ft)
Last Update:
1:42 pm EST Jan 11, 2026
Forecast Valid:
2pm EST Jan 11, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation