10-Day Weather Forecast - Port Jefferson, NY

Sunny. Highs in the upper 70s. Northwest winds 5 to 10 mph.

Mostly clear. Lows in the upper 50s. Northwest winds 5 to 10 mph.

Mostly sunny. Highs in the upper 70s. Southwest winds 5 to 10 mph.

Partly cloudy in the evening then mostly cloudy with a slight chance of showers after midnight. Lows in the lower 60s. South winds around 10 mph. Gusts up to 20 mph in the evening. Chance of rain 20 percent.

Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.

Mostly cloudy with a chance of showers and thunderstorms in the evening then partly cloudy after midnight. Lows in the upper 50s. Chance of rain 50 percent.

Sunny. Highs in the mid 70s.

Mostly clear. Lows in the upper 50s.

Sunny. Highs in the upper 70s.

Partly cloudy. Lows around 60.

Mostly sunny. Highs in the upper 70s.

Partly cloudy in the evening then becoming mostly cloudy. Lows around 60.

Mostly sunny. Highs in the mid 70s.

Mostly clear. Low temperature around 63F. Dew point will be around 58F with an average humidity of 80%. Winds will be 5 mph from the SE.

Sunny. High temperature around 75F. Dew point will be around 60F with an average humidity of 71%. Winds will be 4 mph from the NE.

Clear. Low temperature around 65F. Dew point will be around 60F with an average humidity of 81%. Winds will be 3 mph from the SE.

Sunny. High temperature around 76F. Dew point will be around 62F with an average humidity of 70%. Winds will be 3 mph from the S.

Clear. Low temperature around 67F. Dew point will be around 62F with an average humidity of 80%. Winds will be 6 mph from the S.