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.

Fair

52°F

11°C

Humidity 89%
Wind Speed Calm
Barometer 30.43 in (1030.5 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 11 Oct 1:56 am EDT
Extended Forecast for

Bayport NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 55. East wind around 7 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Periods of rain, mainly after noon. High near 61. East wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Periods of rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 60. Breezy, with an east wind 15 to 20 mph becoming north after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 60 °F

    Heavy Rain
    and Breezy

  • Columbus Day

    Columbus Day: Rain likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 67. North wind 11 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Rain Likely
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. Northwest wind around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 55. East wind around 7 mph.
Sunday
Periods of rain, mainly after noon. High near 61. East wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Periods of rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 60. Breezy, with an east wind 15 to 20 mph becoming north after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Columbus Day
Rain likely, mainly before 8am. Cloudy through mid morning, then gradual clearing, with a high near 67. North wind 11 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 57. Northwest wind around 5 mph.
Tuesday
Partly sunny, with a high near 66.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 54.
Thursday
Mostly sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 53.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 64.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 53. Breezy.
Saturday
Partly sunny, with a high near 60. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Bayport NY
 40.73°N 73.07°W (Elev. 16 ft)
Last Update:
3:14 pm EDT Oct 10, 2026
Forecast Valid:
2am EDT Oct 11, 2026-6pm EDT Oct 17, 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