National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy

76°F

24°C

Humidity 69%
Wind Speed NW 7 mph
Barometer 29.88 in (1011.5 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 3 Aug 7:56 pm EDT
Extended Forecast for

West Sayville NY

High Surf Advisory August 3, 08:51pm until August 3, 09:00pm
Click here for hazard details and duration
...
  •  
    High Surf Advisory August 3, 08:51pm until August 3, 09:00pm

    NOW until 9:00pm Mon

    High Surf Advisory

  • Tonight

    Low: 64 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 80. Northeast wind 6 to 10 mph becoming south in the afternoon.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 67. Southeast wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 80. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 80 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 72. South wind 5 to 8 mph.

    Low: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 64. West wind 6 to 11 mph becoming north after midnight.
Tuesday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 80. Northeast wind 6 to 10 mph becoming south in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 67. Southeast wind around 6 mph becoming calm in the evening.
Wednesday
Partly sunny, with a high near 80. Calm wind becoming south 5 to 8 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers after 2am. Mostly cloudy, with a low around 72. South wind 5 to 8 mph.
Thursday
Mostly sunny, with a high near 84.
Thursday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 73.
Saturday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 85.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 73.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 73.
Monday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
West Sayville NY
 40.74°N 73.1°W (Elev. 30 ft)
Last Update:
6:39 pm EDT Aug 3, 2026
Forecast Valid:
8pm EDT Aug 3, 2026-6pm EDT Aug 10, 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