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.

Overcast

85°F

29°C

Humidity 51%
Wind Speed NW 10 mph
Barometer 29.83 in (1010.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 11 Aug 3:56 pm EDT
Extended Forecast for

Bayport NY

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 87. West wind around 11 mph.

    High: 87 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 70. Southwest wind 5 to 7 mph becoming northwest in the evening.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 8am. Partly sunny, with a high near 86. North wind 7 to 9 mph becoming west in the afternoon.

    High: 86 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70. West wind 3 to 5 mph.

    Low: 70 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 87. West wind around 11 mph.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 70. Southwest wind 5 to 7 mph becoming northwest in the evening.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 8am. Partly sunny, with a high near 86. North wind 7 to 9 mph becoming west in the afternoon.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 70. West wind 3 to 5 mph.
Thursday
Mostly sunny, with a high near 85. Southwest wind 5 to 10 mph.
Thursday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 70.
Friday
A 30 percent chance of showers before 8am. Mostly sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Showers likely. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Monday
Showers likely. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Sunny, with a high near 81.
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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:
3:05 pm EDT Aug 11, 2026
Forecast Valid:
4pm EDT Aug 11, 2026-6pm EDT Aug 18, 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