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.

Overcast

53°F

12°C

Humidity 80%
Wind Speed SE 12 mph
Barometer 29.77 in (1007.9 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 9 May 11:56 pm EDT
Extended Forecast for

Port Jefferson NY

Coastal Flood Advisory until May 10, 03:00am
Click here for hazard details and duration
Coastal Flood Advisory
  •  
    Coastal Flood Advisory until May 10, 03:00am

    NOW until 3:00am Fri

    Coastal Flood Advisory

  • Overnight

    Low: 48 °F

    Rain

  • Friday

    Friday: Rain. High near 56. East wind 14 to 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 46. Northeast wind around 10 mph.

    Low: 46 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 59. Northeast wind around 10 mph.

    High: 59 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Southeast wind 5 to 7 mph.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 59.

    High: 59 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

Overnight
Rain, mainly after 4am. Low around 48. East wind around 14 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
Rain. High near 56. East wind 14 to 17 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 46. Northeast wind around 10 mph.
Saturday
Partly sunny, with a high near 59. Northeast wind around 10 mph.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 47. Southeast wind 5 to 7 mph.
Sunday
A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 59.
Sunday Night
Partly cloudy, with a low around 49.
Monday
Mostly sunny, with a high near 65.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 70.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 66.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 68.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
Last Update:
10:39 pm EDT May 9, 2024
Forecast Valid:
12am EDT May 10, 2024-6pm EDT May 16, 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