10-Day Weather Forecast - Port Jefferson, NY

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  • 80|60°F
    Sunny
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    Today

    80°F

    Sunny. Highs around 80. South winds around 5 mph increasing to 10 to 15 mph this afternoon.

    Tonight

    60°F

    Mostly cloudy with a slight chance of showers in the evening then partly cloudy after midnight. Lows in the upper 50s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the evening. Chance of rain 20 percent.

    Hourly details
  • Day

    80°F

    Partly sunny. A slight chance of showers in the afternoon. Highs around 80. Southwest winds 5 to 10 mph. Chance of rain 20 percent.

    Night

    59°F

    Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening then a chance of showers after midnight. Lows in the mid 50s. Southwest winds 5 to 10 mph. Chance of rain 40 percent.

    Hourly details
  • Day

    81°F

    Partly sunny. Highs in the mid 70s. Southwest winds 5 to 10 mph.

    Night

    58°F

    Mostly cloudy. Lows in the mid 50s.

    Hourly details
  • Day

    72°F

    Mostly cloudy in the morning then becoming partly sunny. A 50 percent chance of showers. Highs in the lower 70s.

    Night

    51°F

    Mostly cloudy. A chance of showers in the evening. Lows around 50. Chance of rain 50 percent.

    Hourly details
  • Weekend Weather

  • Day

    63°F

    Partly sunny. Highs in the lower 60s.

    Night

    48°F

    Mostly cloudy. Lows in the upper 40s.

    Hourly details
  • Day

    62°F

    Mostly cloudy with a 50 percent chance of showers. Highs in the lower 60s.

    Night

    47°F

    Mostly cloudy with a 50 percent chance of showers. Lows in the lower 40s.

    Hourly details
  • Day

    55°F

    Mostly sunny. Highs in the mid 50s.

    Night

    35°F

    Mostly clear. Low temperature around 35F. Dew point will be around 24F with an average humidity of 53%. Winds will be 10 mph from the NW.

  • Day

    54°F

    Sunny. High temperature around 54F. Dew point will be around 25F with an average humidity of 42%. Winds will be 5 mph from the NW.

    Night

    42°F

    Clear. Low temperature around 42F. Dew point will be around 30F with an average humidity of 57%. Winds will be 3 mph from the SW.

  • Day

    63°F

    Sunny. High temperature around 63F. Dew point will be around 39F with an average humidity of 54%. Winds will be 5 mph from the SW.

    Night

    49°F

    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 49F. Dew point will be around 44F with an average humidity of 75%. Winds will be 2 mph from the SW.

  • Day

    64°F

    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 64F. Dew point will be around 46F with an average humidity of 65%. Winds will be 3 mph from the SE.

    Night

    50°F

    Cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 50F. Dew point will be around 46F with an average humidity of 79%. Winds will be 3 mph from the SE.