Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

72°F

22°C

Humidity 66%
Wind Speed SW 12 G 22 mph
Barometer 30.06 in (1017.7 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 28 Aug 10:56 pm EDT
Extended Forecast for

Sayville NY

  • Tonight

    Tonight: A 20 percent chance of showers before 5am.  Mostly cloudy, with a low around 66. Southwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 66 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers between 8am and 11am, then a slight chance of showers and thunderstorms after 11am.  Partly sunny, with a high near 76. Southwest wind around 11 mph.  Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. West wind 6 to 8 mph becoming north in the evening.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74. Northwest wind around 7 mph.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60. Southwest wind around 6 mph becoming north after midnight.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers before 5am. Mostly cloudy, with a low around 66. Southwest wind 11 to 13 mph, with gusts as high as 23 mph.
Friday
A slight chance of showers between 8am and 11am, then a slight chance of showers and thunderstorms after 11am. Partly sunny, with a high near 76. Southwest wind around 11 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 58. West wind 6 to 8 mph becoming north in the evening.
Saturday
Sunny, with a high near 74. Northwest wind around 7 mph.
Saturday Night
Mostly clear, with a low around 60. Southwest wind around 6 mph becoming north after midnight.
Sunday
Sunny, with a high near 74.
Sunday Night
Mostly clear, with a low around 59.
Labor Day
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Sayville NY
 40.73°N 73.07°W (Elev. 16 ft)
9:32 pm EDT Aug 28, 2025
11pm EDT Aug 28, 2025-6pm EDT Sep 4, 2025
 
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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