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.

Overcast

60°F

16°C

Humidity 80%
Wind Speed W 9 mph
Barometer 29.65 in (1003.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 8 Nov 4:56 am EST
Extended Forecast for

Sayville NY

  • Overnight

    Overnight: Showers. Low around 53. West wind around 13 mph. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Saturday

    Saturday: Showers likely, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 63. Northwest wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers
    Likely then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Northwest wind 5 to 8 mph becoming east after midnight.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 61. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 61 °F

    Chance Rain
    then Rain
    Likely

  • Sunday Night

    Sunday Night: Rain, mainly before midnight. Low around 49. East wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Rain then
    Chance Rain

  • Monday

    Monday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 46. Breezy.

    High: 46 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. Breezy.

    Low: 37 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

Detailed Forecast

Overnight
Showers. Low around 53. West wind around 13 mph. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before 7am. Cloudy through mid morning, then gradual clearing, with a high near 63. Northwest wind 8 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 48. Northwest wind 5 to 8 mph becoming east after midnight.
Sunday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 61. Southeast wind 10 to 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain, mainly before midnight. Low around 49. East wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Partly sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 31.
Veterans Day
Mostly sunny, with a high near 46. Breezy.
Tuesday Night
Partly cloudy, with a low around 37. Breezy.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Mostly sunny, with a high near 52.
Thursday Night
Mostly clear, with a low around 38.
Friday
Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sayville NY
 40.73°N 73.07°W (Elev. 16 ft)
Last Update:
5:04 am EST Nov 8, 2025
Forecast Valid:
5am EST Nov 8, 2025-6pm EST Nov 14, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation