Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Fog

53°F

12°C

Humidity 100%
Wind Speed S 16 G 31 mph
Barometer 29.70 in (1005.9 mb)
Dewpoint 53°F (12°C)
Visibility 0.13 mi
Wind Chill48°F (9°C)
Last update 16 Mar 12:56 pm EDT
Extended Forecast for

Port Jefferson NY

Wind Advisory March 16, 02:00pm until March 17, 04:00am
Click here for hazard details and duration
Wind Advisory
  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm.  Areas of fog. High near 58. Breezy, with a south wind 18 to 21 mph, with gusts as high as 36 mph.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Showers and
    Areas Fog

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Areas of fog before 2am. Low around 35. Breezy, with a south wind 18 to 24 mph becoming west after midnight. Winds could gust as high as 47 mph.  Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 35 °F

    Showers and
    Areas Fog

  • Tuesday

    Tuesday: Mostly sunny, with a steady temperature around 38. West wind around 15 mph, with gusts as high as 25 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. Wind chill values between 15 and 20. West wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. Northwest wind around 7 mph.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Areas of fog. High near 58. Breezy, with a south wind 18 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers. Areas of fog before 2am. Low around 35. Breezy, with a south wind 18 to 24 mph becoming west after midnight. Winds could gust as high as 47 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Mostly sunny, with a steady temperature around 38. West wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 25. Wind chill values between 15 and 20. West wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 38. Northwest wind around 7 mph.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly sunny, with a high near 43.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 50.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 47. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 34.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 44.
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ABOUT THIS FORECAST

 
Point Forecast:
Port Jefferson NY
 40.93°N 73.06°W (Elev. 161 ft)
11:41 am EDT Mar 16, 2026
1pm EDT Mar 16, 2026-6pm EDT Mar 22, 2026
 
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Additional Resources

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