National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Overcast

76°F

24°C

Humidity 82%
Wind Speed S 13 G 25 mph
Barometer 29.70 in (1005.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 28 Jul 4:56 pm EDT
Extended Forecast for

Bayport NY

Flood Watch July 28, 05:50pm until July 29, 08:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 28, 05:50pm until July 29, 08:00pm

    NOW until 8:00pm Wed

    Flood Watch

  • This Afternoon

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 70. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    Low: 70 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 78. Southeast wind around 11 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 78 °F

    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. West wind 6 to 8 mph becoming northwest in the evening. Chance of precipitation is 50%.

    Low: 67 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 78. North wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 76. South wind around 15 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 70. South wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Wednesday
Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 78. Southeast wind around 11 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. West wind 6 to 8 mph becoming northwest in the evening. Chance of precipitation is 50%.
Thursday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 78. North wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, with a low around 65.
Friday
Mostly sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 66.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Mostly cloudy, with a low around 67.
Sunday
Partly sunny, with a high near 80.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 67.
Monday
Partly sunny, with a high near 81.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Mostly sunny, with a high near 82.
Basemap Options
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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:
2:34 pm EDT Jul 28, 2026
Forecast Valid:
5pm EDT Jul 28, 2026-6pm EDT Aug 4, 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