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

59°F

15°C

Humidity 87%
Wind Speed Calm
Barometer 29.84 in (1010.4 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 25 May 3:56 am EDT
Extended Forecast for

Sayville NY

  • Today

    Today: Sunny, with a high near 74. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 74 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 57. South wind around 6 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 74. South wind 5 to 9 mph.

    High: 74 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 59. South wind around 6 mph.

    Low: 59 °F

    Mostly Cloudy

  • Memorial Day

    Memorial Day: A 50 percent chance of showers, mainly after 3pm. Cloudy, with a high near 72. Southeast wind 7 to 14 mph.

    High: 72 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Low around 61. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Tuesday

    Tuesday: A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 76.

    High: 76 °F

    Chance
    Showers then
    Sunny

  • Tuesday Night

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

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 74.

    High: 74 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 74. Calm wind becoming southeast 5 to 8 mph in the morning.
Tonight
Mostly cloudy, with a low around 57. South wind around 6 mph.
Sunday
Partly sunny, with a high near 74. South wind 5 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 59. South wind around 6 mph.
Memorial Day
A 50 percent chance of showers, mainly after 3pm. Cloudy, with a high near 72. Southeast wind 7 to 14 mph.
Monday Night
A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Low around 61. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 74.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Sayville NY
 40.74°N 73.1°W (Elev. 30 ft)
Last Update:
3:08 am EDT May 25, 2024
Forecast Valid:
4am EDT May 25, 2024-6pm EDT May 31, 2024
 
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