10-Day Weather Forecast - Port Jefferson, NY

Sunny. Highs around 40. West winds 15 to 20 mph with gusts up to 30 mph.

Partly cloudy. Lows around 30. Southwest winds 10 to 15 mph.

Sunny. Highs in the mid 40s. Southwest winds 5 to 10 mph.

Mostly cloudy. Lows in the mid 30s.

Mostly cloudy. Highs in the mid 40s.

Cloudy. A chance of rain after midnight. Lows in the mid 30s. Chance of rain 40 percent.

Mostly cloudy. A chance of rain. Highs in the lower 40s. Chance of rain 50 percent.

Mostly cloudy. A chance of rain and snow in the evening then a chance of snow after midnight. Lows in the lower 20s. Chance of precipitation 40 percent.

Mostly sunny. Highs in the mid 30s.

Partly cloudy. Lows in the mid 20s.

Mostly sunny. Highs in the upper 30s.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 20s.

Partly sunny. A chance of rain and snow in the morning then a chance of rain in the afternoon. Highs in the mid 30s. Chance of precipitation 40 percent.

Partly cloudy. Low temperature around 23F. Dew point will be around 22F with an average humidity of 77%. Winds will be 10 mph from the W.

Cloudy. High temperature around 29F. Dew point will be around 18F with an average humidity of 69%. Winds will be 13 mph from the W.

Partly cloudy. Low temperature around 19F. Dew point will be around 14F with an average humidity of 70%. Winds will be 13 mph from the W.

Sunny. High temperature around 27F. Dew point will be around 14F with an average humidity of 64%. Winds will be 13 mph from the W.

Clear. Low temperature around 19F. Dew point will be around 13F with an average humidity of 67%. Winds will be 10 mph from the W.