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.

Heavy Rain Fog/Mist

63°F

17°C

Humidity 97%
Wind Speed N 6 mph
Barometer 29.79 in (1008.7 mb)
Dewpoint 62°F (17°C)
Visibility 1.50 mi
Last update 6 Nov 4:56 pm EST
Extended Forecast for

Sayville NY

  • This Afternoon

    This Afternoon: Rain likely. Cloudy, with a steady temperature around 62. Southwest wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 62 °F

    Rain Likely

  • Tonight

    Tonight: Rain likely, mainly before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 55. West wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Rain Likely

  • Saturday

    Saturday: Sunny, with a high near 64. West wind 7 to 13 mph.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41. West wind 13 to 15 mph.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 61. West wind 13 to 15 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain likely. Cloudy, with a steady temperature around 62. Southwest wind around 8 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain likely, mainly before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 55. West wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Sunny, with a high near 64. West wind 7 to 13 mph.
Saturday Night
Mostly clear, with a low around 41. West wind 13 to 15 mph.
Sunday
Sunny, with a high near 61. West wind 13 to 15 mph.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 59.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
Mostly clear, with a low around 44.
Veterans Day
Mostly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Partly sunny, with a high near 53.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sayville NY
 40.74°N 73.1°W (Elev. 30 ft)
Last Update:
1:27 pm EST Nov 6, 2026
Forecast Valid:
5pm EST Nov 6, 2026-6pm EST Nov 13, 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