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.

Partly Cloudy

74°F

23°C

Humidity 71%
Wind Speed SE 3 mph
Barometer 30.15 in (1020.8 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 16 Aug 8:56 am EDT
Extended Forecast for

Village of the Branch NY

  • Today

    Today: Mostly sunny, with a high near 81. Light and variable wind becoming south 6 to 11 mph in the morning.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers likely, then showers and possibly a thunderstorm after 2am. Low around 67. South wind 9 to 13 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and 2pm. High near 83. South wind 7 to 9 mph becoming north in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Showers then
    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68. Light north wind.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. North wind around 6 mph.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 81. Light and variable wind becoming south 6 to 11 mph in the morning.
Tonight
Showers likely, then showers and possibly a thunderstorm after 2am. Low around 67. South wind 9 to 13 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and 2pm. High near 83. South wind 7 to 9 mph becoming north in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 68. Light north wind.
Tuesday
Mostly sunny, with a high near 85. North wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 85.
Wednesday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 69.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Village of the Branch NY
 40.86°N 73.19°W (Elev. 98 ft)
Last Update:
2:19 am EDT Aug 16, 2026
Forecast Valid:
9am EDT Aug 16, 2026-6pm EDT Aug 22, 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