10-Day Weather Forecast - Portsmouth, NH

Areas of fog in the morning. Mostly cloudy with a chance of rain in the morning then partly sunny in the afternoon. Highs in the lower 40s. Temperatures falling to around 30 in the afternoon. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.

Partly cloudy in the evening then becoming mostly clear. Cooler with lows around 12. West winds around 10 mph with gusts up to 25 mph. Wind chill values as low as zero.

Mostly sunny. Highs around 30.

Mostly cloudy in the evening then becoming partly cloudy. Lows in the lower 20s.

Partly sunny. Highs around 40.

Partly cloudy. Lows in the mid 20s.

Partly sunny. Highs in the mid 30s.

Partly cloudy. Lows around 20.

Partly sunny. Highs in the lower 30s.

Partly cloudy. Lows 15 to 20.

Partly sunny. Highs in the mid 20s.

Mostly clear. Low temperature around 12F. Dew point will be around 1F with an average humidity of 52%. Winds will be 8 mph from the W.

Partly cloudy. High temperature around 22F. Dew point will be around 2F with an average humidity of 48%. Winds will be 9 mph from the W.

Cloudy. Low temperature around 14F. Dew point will be around 4F with an average humidity of 57%. Winds will be 6 mph from the W.

Mostly sunny. High temperature around 24F. Dew point will be around 6F with an average humidity of 53%. Winds will be 8 mph from the W.

Partly cloudy. Low temperature around 15F. Dew point will be around 6F with an average humidity of 60%. Winds will be 6 mph from the W.

Partly cloudy with a slight chance of snow. Chance of precipitation 25%. High temperature around 29F. Dew point will be around 12F with an average humidity of 60%. Winds will be 6 mph from the W.

Cloudy with a slight chance of snow. Chance of precipitation 25%. Low temperature around 22F. Dew point will be around 17F with an average humidity of 75%. Winds will be 4 mph from the W.