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.

Overcast

64°F

18°C

Humidity 96%
Wind Speed SW 10 mph
Barometer 29.86 in (1011.2 mb)
Dewpoint 63°F (17°C)
Visibility 8.00 mi
Last update 6 Nov 3:56 am EST
Extended Forecast for

4 Miles SSW Bellport NY

  • Overnight

    Overnight: Rain and possibly a thunderstorm. Low around 61. South wind around 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Rain

  • Friday

    Friday: Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 64. South wind 13 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 64 °F

    Heavy Rain

  • Friday Night

    Friday Night: Rain, mainly before 1am. Low around 57. West wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 57 °F

    Rain then
    Rain Likely

  • Saturday

    Saturday: Sunny, with a high near 61. West wind 9 to 18 mph.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 50. Windy, with a west wind 23 to 26 mph.

    Low: 50 °F

    Partly Cloudy
    and Windy

  • Sunday

    Sunday: Sunny, with a high near 59. Breezy.

    High: 59 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Breezy.

    Low: 50 °F

    Mostly Clear
    and Breezy

  • Monday

    Monday: Sunny, with a high near 57. Breezy.

    High: 57 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 49. Breezy.

    Low: 49 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

Detailed Forecast

Overnight
Rain and possibly a thunderstorm. Low around 61. South wind around 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Rain and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 64. South wind 13 to 17 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
Rain, mainly before 1am. Low around 57. West wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Sunny, with a high near 61. West wind 9 to 18 mph.
Saturday Night
Partly cloudy, with a low around 50. Windy, with a west wind 23 to 26 mph.
Sunday
Sunny, with a high near 59. Breezy.
Sunday Night
Mostly clear, with a low around 50. Breezy.
Monday
Sunny, with a high near 57. Breezy.
Monday Night
Mostly clear, with a low around 49. Breezy.
Tuesday
Sunny, with a high near 60. Breezy.
Tuesday Night
Mostly clear, with a low around 50. Breezy.
Veterans Day
Sunny, with a high near 57.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Bellport NY
 40.7°N 72.96°W (Elev. 0 ft)
Last Update:
2:56 am EST Nov 6, 2026
Forecast Valid:
4am EST Nov 6, 2026-6pm EST Nov 12, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation