A northeasterly and very variable flow prevails over the whole area.
For Viana do Castelo :
Warning strong breeze offshore.
The reliability of the situation is poor.
For the night from Monday to Tuesday N wind force 1 continuing all night. Gusts reaching 4 knots.
Smooth to slight sea. Low, fairly long swell from WNW. Excellent visibility becoming excellent at the end of the night. Daytime of Tuesday 15 september : The weather will be good.
Fair weather with mostly clear skies. In the evening, clear skies.
NNW force 2 becoming NW force 3 in the middle of the day then N. Gusts reaching 18 knots in the evening. Slight sea. Low, fairly long swell from WNW. Visibility reduced by mist becoming excellent in the middle of the day.