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.

Light Rain

73°F

23°C

Humidity 94%
Wind Speed N 8 mph
Barometer 30.07 in (1018.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 7 Aug 8:56 pm EDT
Extended Forecast for

Bayport NY

Heat Advisory August 7, 09:41pm until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 7, 09:41pm until August 8, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 75 °F

    Showers then
    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 85. Southwest wind 7 to 13 mph. Chance of precipitation is 30%.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 75. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 86. Southwest wind 7 to 11 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 73. West wind 5 to 7 mph becoming light and variable after midnight.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Chance
    Showers

Detailed Forecast

Tonight
Showers, mainly before 11pm. Low around 75. Southwest wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 85. Southwest wind 7 to 13 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 75. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 86. Southwest wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 73. West wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 75.
Tuesday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 85.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 73.
Wednesday
Partly sunny, with a high near 81.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 70.
Friday
Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Bayport NY
 40.73°N 73.04°W (Elev. 0 ft)
Last Update:
8:49 pm EDT Aug 7, 2026
Forecast Valid:
9pm EDT Aug 7, 2026-6pm EDT Aug 14, 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