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

17°C

62°F

Humidity 67%
Wind Speed SE 9 km/h
Barometer 1006.5 mb (29.72 in)
Dewpoint 11°C (51°F)
Visibility 16 km
Last update 9 May 6:56 pm EDT
Extended Forecast for

Port Jefferson NY

Coastal Flood Advisory May 9, 11:00pm until May 10, 03:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: Rain, mainly after 2am. Low around 9. East wind 10 to 15 km/h increasing to 18 to 23 km/h after midnight. Chance of precipitation is 90%. New precipitation amounts between 2.5 and 5 mm possible.

    Low: 9 °C

    Chance Rain
    then Rain

  • Friday

    Friday: Rain. High near 13. East wind 23 to 27 km/h. Chance of precipitation is 80%. New precipitation amounts between 5 and 7.5 mm possible.

    High: 13 °C

    Rain

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 8. Northeast wind 14 to 16 km/h.

    Low: 8 °C

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 15. Northeast wind 14 to 16 km/h.

    High: 15 °C

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 8. Southeast wind 8 to 11 km/h.

    Low: 8 °C

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 15.

    High: 15 °C

    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 9.

    Low: 9 °C

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 18.

    High: 18 °C

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 13.

    Low: 13 °C

    Mostly Cloudy

Detailed Forecast

Tonight
Rain, mainly after 2am. Low around 9. East wind 10 to 15 km/h increasing to 18 to 23 km/h after midnight. Chance of precipitation is 90%. New precipitation amounts between 2.5 and 5 mm possible.
Friday
Rain. High near 13. East wind 23 to 27 km/h. Chance of precipitation is 80%. New precipitation amounts between 5 and 7.5 mm possible.
Friday Night
A 30 percent chance of showers, mainly before 2am. Mostly cloudy, with a low around 8. Northeast wind 14 to 16 km/h.
Saturday
Partly sunny, with a high near 15. Northeast wind 14 to 16 km/h.
Saturday Night
A 30 percent chance of showers after 2am. Mostly cloudy, with a low around 8. Southeast wind 8 to 11 km/h.
Sunday
A 30 percent chance of showers before 2pm. Mostly cloudy, with a high near 15.
Sunday Night
Partly cloudy, with a low around 9.
Monday
Mostly sunny, with a high near 18.
Monday Night
Mostly cloudy, with a low around 13.
Tuesday
A 30 percent chance of showers after 2pm. Partly sunny, with a high near 21.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 13.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 19.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 13.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 20.
Click Map For Forecast
Disclaimer
Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 m)
Last Update:
5:37 pm EDT May 9, 2024
Forecast Valid:
7pm EDT May 9, 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