10-Day Weather Forecast - Portsmouth, NH

Sunny hazy. Highs in the lower 80s. Light and variable winds becoming south around 10 mph in the afternoon.

Mostly clear. Lows in the lower 60s. South winds around 10 mph in the evening becoming light and variable.

Mostly sunny. Hazy warm with highs in the mid 80s. Light and variable winds.

Mostly clear. Lows in the lower 60s.

Mostly sunny. Highs in the upper 70s.

Partly cloudy. Lows in the lower 60s.

Partly sunny. Highs in the upper 70s.

Partly cloudy. Lows in the lower 60s.

Partly sunny. Highs in the upper 70s.

Partly cloudy. Lows in the lower 60s.

Mostly sunny. Highs in the lower 80s.

Mostly clear. Low temperature around 60F. Dew point will be around 59F with an average humidity of 80%. Winds will be 5 mph from the S.

Sunny. High temperature around 81F. Dew point will be around 64F with an average humidity of 67%. Winds will be 5 mph from the S.

Clear. Low temperature around 68F. Dew point will be around 64F with an average humidity of 80%. Winds will be 5 mph from the S.

Sunny. High temperature around 84F. Dew point will be around 69F with an average humidity of 71%. Winds will be 5 mph from the S.

Mostly clear. Low temperature around 71F. Dew point will be around 69F with an average humidity of 82%. Winds will be 5 mph from the S.

Sunny. High temperature around 87F. Dew point will be around 71F with an average humidity of 71%. Winds will be 5 mph from the S.

Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 71F. Dew point will be around 70F with an average humidity of 85%. Winds will be 4 mph from the S.