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

27°F

-3°C

Humidity 81%
Wind Speed Calm
Barometer 30.31 in (1026.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 19 Mar 6:56 am EDT
Extended Forecast for

Bayport NY

  • Today

    Today: Mostly sunny, with a high near 41. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 41 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Calm wind becoming southwest around 5 mph.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Rain likely. Mostly cloudy, with a low around 40. South wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 40 °F

    Rain Likely

  • Saturday

    Saturday: Mostly sunny, with a high near 53. West wind 8 to 10 mph.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 8am. Mostly cloudy, with a high near 46. Chance of precipitation is 60%.

    High: 46 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 41. Calm wind becoming southeast around 6 mph in the afternoon.
Tonight
Partly cloudy, with a low around 34. Calm wind becoming southwest around 5 mph.
Friday
Mostly sunny, with a high near 47. Light and variable wind becoming south 5 to 10 mph in the morning.
Friday Night
Rain likely. Mostly cloudy, with a low around 40. South wind around 11 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 53. West wind 8 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 51.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Mostly cloudy, with a high near 46. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 28.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bayport NY
 40.73°N 73.04°W (Elev. 0 ft)
Last Update:
2:26 am EDT Mar 19, 2026
Forecast Valid:
7am EDT Mar 19, 2026-6pm EDT Mar 25, 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