Port Jefferson, New York | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Saturday
    Mostly Sunny
    60°
    Forecast night icon
    Night
    Mostly Cloudy
    47°
    Saturday 5/11
    Day
    60°
    Mostly Sunny
    Forecast day icon
    Night
    47°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. High temperature around 60F. Dew point will be around 45F with an average humidity of 68%. Winds will be 5 mph from the NE.
    Night Details
    Mostly cloudy. A slight chance of showers after midnight. Lows in the mid 40s. Southeast winds 5 to 10 mph. Chance of rain 20 percent.
  • Forecast day icon
    Sunday
    50% Chance Rain Showers
    55°
    Forecast night icon
    Night
    Partly Cloudy
    47°
    Sunday 5/12
    Day
    55°
    50% Chance Rain Showers
    Forecast day icon
    Night
    47°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. A chance of showers mainly in the morning. Highs in the mid 50s. Southeast winds 5 to 10 mph. Chance of rain 50 percent.
    Night Details
    Partly cloudy in the evening then clearing. Lows in the mid 40s. Southwest winds around 5 mph.
  • Forecast day icon
    Monday
    Mostly Sunny
    64°
    Forecast night icon
    Night
    Mostly Cloudy
    52°
    Monday 5/13
    Day
    64°
    Mostly Sunny
    Forecast day icon
    Night
    52°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the lower 60s. Southwest winds 10 to 15 mph.
    Night Details
    Mostly cloudy. A slight chance of showers after midnight. Lows in the lower 50s. South winds 10 to 15 mph. Chance of rain 20 percent.
  • Forecast day icon
    Tuesday
    50% Chance Rain Showers
    71°
    Forecast night icon
    Night
    Rain
    58°
    Tuesday 5/14
    Day
    71°
    50% Chance Rain Showers
    Forecast day icon
    Night
    58°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 50 percent.
    Night Details
    Rain. Lows in the upper 50s. Chance of rain 90 percent.
  • Forecast day icon
    Wednesday
    Rain
    67°
    Forecast night icon
    Night
    50% Chance Rain Showers
    55°
    Wednesday 5/15
    Day
    67°
    Rain
    Forecast day icon
    Night
    55°
    50% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Rain. Highs in the mid 60s. Chance of rain 90 percent.
    Night Details
    Mostly cloudy with a chance of showers. Lows in the mid 50s. Chance of rain 50 percent.
  • Forecast day icon
    Thursday
    30% Chance Rain Showers
    70°
    Forecast night icon
    Night
    Partly Cloudy
    53°
    Thursday 5/16
    Day
    70°
    30% Chance Rain Showers
    Forecast day icon
    Night
    53°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. A chance of showers in the morning. Highs around 70. Chance of rain 30 percent.
    Night Details
    Partly cloudy. Lows in the mid 50s.
  • Forecast day icon
    Friday
    Partly Sunny
    67°
    Forecast night icon
    Night
    40% Chance Rain Showers
    54°
    Friday 5/17
    Day
    67°
    Partly Sunny
    Forecast day icon
    Night
    54°
    40% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the upper 60s.
    Night Details
    Mostly cloudy with a 40 percent chance of showers. Lows in the mid 50s.
  • Forecast day icon
    Saturday
    40% Chance Rain Showers
    70°
    Forecast night icon
    Night
    40% Chance of Rain
    57°
    Saturday 5/18
    Day
    70°
    40% Chance Rain Showers
    Forecast day icon
    Night
    57°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Mostly cloudy with a 40 percent chance of showers. Highs in the upper 60s.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 57F. Dew point will be around 56F with an average humidity of 86%. Winds will be 4 mph from the W.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    72°
    Forecast night icon
    Night
    30% Chance of Rain
    59°
    Sunday 5/19
    Day
    72°
    30% Chance of Rain
    Forecast day icon
    Night
    59°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 72F. Dew point will be around 56F with an average humidity of 70%. Winds will be 6 mph from the W.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 59F. Dew point will be around 55F with an average humidity of 79%. Winds will be 6 mph from the W.
  • Forecast day icon
    Monday
    40% Chance of Rain
    72°
    Forecast night icon
    Night
    30% Chance of Rain
    57°
    Monday 5/20
    Day
    72°
    40% Chance of Rain
    Forecast day icon
    Night
    57°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a chance of rain. Chance of precipitation 35%. High temperature around 72F. Dew point will be around 56F with an average humidity of 69%. Winds will be 6 mph from the W.
    Night Details
    Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 57F. Dew point will be around 54F with an average humidity of 77%. Winds will be 4 mph from the W.