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.

Mostly Cloudy

76°F

24°C

Humidity 69%
Wind Speed NW 7 mph
Barometer 29.88 in (1011.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 3 Aug 7:56 pm EDT
Extended Forecast for

Village of the Branch NY

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 64. West wind 5 to 10 mph becoming light and variable after midnight.

    Low: 64 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Northeast wind 5 to 7 mph becoming south in the afternoon.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 65. Southeast wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 81. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 81 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 71. South wind 3 to 7 mph.

    Low: 71 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 73. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 64. West wind 5 to 10 mph becoming light and variable after midnight.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Northeast wind 5 to 7 mph becoming south in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 65. Southeast wind around 6 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 81. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 71. South wind 3 to 7 mph.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
A chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
Friday
Mostly sunny, with a high near 87.
Friday Night
Partly cloudy, with a low around 72.
Saturday
A 40 percent chance of showers after 2pm. Mostly sunny, with a high near 86.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 72.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 72.
Monday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Village of the Branch NY
 40.84°N 73.2°W (Elev. 49 ft)
Last Update:
6:39 pm EDT Aug 3, 2026
Forecast Valid:
8pm EDT Aug 3, 2026-6pm EDT Aug 10, 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