A westerly, moderate and mostly variable flow prevails over the whole area.
For Viana do Castelo :
No gale warning.
The reliability of the situation is very good.
Skies changeable to very cloudy. No precipitation. In the evening, skies with few clouds.
SW force 1 freshening W force 3 in the middle of the day then becoming NW. Gusts reaching 16 knots in the evening. Moderate sea. Moderate, fairly long swell from W. Good visibility becoming excellent in the middle of the day then good.