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

65°F

18°C

Humidity 84%
Wind Speed SW 8 mph
Barometer 29.82 in (1009.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 17 Jun 2:56 am EDT
Extended Forecast for

Village of the Branch NY

  • Overnight

    Overnight: Mostly cloudy, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. Calm wind becoming south 5 to 9 mph in the morning.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 64. South wind around 7 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 81. South wind 13 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. Southwest wind 8 to 13 mph.

    Low: 69 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Friday Night

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

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 61. Light south wind.
Wednesday
Mostly sunny, with a high near 77. Calm wind becoming south 5 to 9 mph in the morning.
Wednesday Night
Increasing clouds, with a low around 64. South wind around 7 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 81. South wind 13 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 69. Southwest wind 8 to 13 mph.
Juneteenth
Mostly sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 86.
Sunday Night
A 40 percent chance of showers. Partly cloudy, with a low around 65.
Monday
Showers likely. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Monday Night
Showers likely. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Tuesday
Mostly sunny, with a high near 85.
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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:
3:08 am EDT Jun 17, 2026
Forecast Valid:
3am EDT Jun 17, 2026-6pm EDT Jun 23, 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