A westerly, weak and particularly variable flow prevails over the whole area.
For Viana do Castelo :
No gale warning.
For the night from Sunday to Monday N force 2 becoming NNE force 1 in the middle of the night then NE. Gusts reaching 9 knots in the early part of the night.
Slight sea. Low, short swell from WNW. Good visibility becoming poor in the middle of the night then poor. Daytime of Monday 24 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, showers late in the day. In the evening, cloudy spells, sometimes dense.
Light showers. NW force 1 becoming WNW force 2 in the middle of the day then NW force 3. Gusts reaching 13 knots in the evening. Slight sea. Low, fairly long swell from WNW. Poor visibility becoming excellent in the middle of the day then excellent.