Marine Weather Net

Port Jefferson, NY Weather Forecast




Port Jefferson, New York

 Lat: 40.95N, Lon: 73.06W

Current Conditions Updated: 456 PM EDT TUE OCT 28 2025

Mostly Cloudy
Temp: 55°F
  • Humidity:
  • 54%
  • Winds:
  • 10 MPH NE
  • Gusts:
  • N/A MPH
  • Barometer:
  • 30.21 in.
  • Dewpoint:
  • 39°F
  • Heat index:
  • 55°F

  • Sunrise:
  • 7:16 AM EDT
  • Sunset:
  • 5:52 PM EDT
  • Moonrise:
  • 1:50 PM EDT
  • Moonset:
  • 11:00 PM EDT

THIS AFTERNOON

PARTLY SUNNY
Lo: 45°F

WEDNESDAY

CHANCE OF LIGHT RAIN
Hi: 55°F
Lo: 49°F
Precip: 20%

THURSDAY

RAIN
Hi: 61°F
Lo: 50°F
Precip: 90%

FRIDAY

PARTLY SUNNY
Lo: 45°F
Precip: 50%
Weather Forecast In Detail:
Forecast Issued: 203 PM EDT Tue Oct 28 2025

This Afternoon...Partly sunny. Near steady temperature in the mid 50s. Northeast winds 15 to 20 mph with gusts up to 30 mph.
Tonight...Mostly cloudy with a 40 percent chance of light rain. Lows in the mid 40s. Northeast winds 15 to 20 mph with gusts up to 30 mph.
Wednesday...Mostly cloudy with a 20 percent chance of light rain. Highs in the mid 50s. Northeast winds 15 to 20 mph.
Wednesday Night...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 40s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Thursday...Rain. Highs in the lower 60s. East winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 90 percent.
Thursday Night...Rain with a chance of thunderstorms in the evening, then rain after midnight. Rain May be heavy at Times in the evening. Breezy with lows around 50. Chance of rain 90 percent.
Friday...Partly sunny. A chance of rain in the morning. Windy with highs in the upper 50s. Chance of rain 50 percent.
Friday Night...Partly cloudy and windy. Lows in the mid 40s.
Saturday...Mostly sunny and breezy. Highs in the upper 50s.
Saturday Night...Partly cloudy. Lows in the lower 40s.
Sunday...Mostly sunny. Highs in the mid 50s.
Sunday Night...Partly cloudy. Lows in the lower 40s.
Monday...Partly sunny with a 40 percent chance of showers. Highs in the upper 50s.
Monday Night...Mostly cloudy with a 50 percent chance of showers. Lows in the mid 40s.
Tuesday...Partly sunny. A chance of showers in the morning. Highs in the upper 50s. Chance of rain 50 percent.
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