A northwesterly and variable flow prevails over the whole area.
For Viana do Castelo :
No gale warning.
For the night from Saturday to Sunday N force 3 in the early part of the night becoming force 2.
Slight sea. Low, short swell from NW. Good visibility becoming poor in the middle of the night then poor. Daytime of Sunday 16 august : The weather will be good.
Fair weather with mostly clear skies. In the evening, relatively clear skies becoming changeable.
N force 2 freshening NW force 4 in the middle of the day then N force 3. Slight sea. Low, short swell from NW. Poor visibility becoming excellent in the middle of the day.