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

79°F

26°C

Humidity 74%
Wind Speed SW 7 mph
Barometer 29.99 in (1015.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 28 Aug 4:56 pm EDT
Extended Forecast for

Patchogue NYSimilar City Names

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Light and variable wind becoming north 5 to 9 mph after midnight.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. North wind 5 to 8 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. Light southwest wind.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 79. Light west wind becoming southwest 6 to 11 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 69. Southwest wind 7 to 10 mph.

    Low: 69 °F

    Chance
    Showers

  • Monday

    Monday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 78.

    High: 78 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of thunderstorms before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.

    Low: 69 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 61. Light and variable wind becoming north 5 to 9 mph after midnight.
Saturday
Sunny, with a high near 77. North wind 5 to 8 mph.
Saturday Night
Mostly clear, with a low around 62. Light southwest wind.
Sunday
Mostly sunny, with a high near 79. Light west wind becoming southwest 6 to 11 mph in the morning.
Sunday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 69. Southwest wind 7 to 10 mph.
Monday
Partly sunny, with a high near 81.
Monday Night
A 40 percent chance of showers after 2am. Mostly cloudy, with a low around 68.
Tuesday
A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 78.
Tuesday Night
A chance of thunderstorms before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 80.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 69.
Thursday
A 40 percent chance of showers. Partly sunny, with a high near 81.
Thursday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 67.
Friday
Mostly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Patchogue NYSimilar City Names
 40.77°N 73°W (Elev. 43 ft)
Last Update:
2:11 pm EDT Aug 28, 2026
Forecast Valid:
5pm EDT Aug 28, 2026-6pm EDT Sep 4, 2026
 
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Additional Resources

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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