Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fair

71°F

22°C

Humidity 87%
Wind Speed SW 12 mph
Barometer 30.30 in (1025.9 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 19 Jun 12:56 am EDT
Extended Forecast for

Port Jefferson NY

  • Overnight

    Overnight: Partly cloudy, with a low around 67. Southwest wind around 9 mph.

    Low: 67 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 86. Southwest wind 8 to 10 mph.

    High: 86 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. South wind 9 to 11 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 87. Southwest wind around 10 mph.

    High: 87 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 70. South wind 9 to 13 mph.

    Low: 70 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 8am.  Mostly cloudy, with a high near 81.

    High: 81 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 67. Southwest wind around 9 mph.
Juneteenth
Mostly sunny, with a high near 86. Southwest wind 8 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 68. South wind 9 to 11 mph.
Thursday
Mostly sunny, with a high near 87. Southwest wind around 10 mph.
Thursday Night
Partly cloudy, with a low around 70. South wind 9 to 13 mph.
Friday
A 40 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 68.
Saturday
A 30 percent chance of showers and thunderstorms after 8am. Mostly cloudy, with a high near 81.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
Sunny, with a high near 83.
Click Map For Forecast

ABOUT THIS FORECAST

 
Point Forecast:
Port Jefferson NY
 40.95°N 73.05°W (Elev. 151 ft)
10:35 pm EDT Jun 18, 2024
1am EDT Jun 19, 2024-6pm EDT Jun 25, 2024
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database