Low 1016 hPa centered on the North of Portugal moving at 8 knots to the North-West to be centered off North Portugal.
For Viana do Castelo :
No gale warning.
The reliability of the situation is very good.
Warm sun all day. In the evening, clear skies.
NE force 1 turning WNW force 2 in the middle of the day then SW. Gusts reaching 11 knots in the middle of the day. Smooth to slight sea. Low, fairly long swell from WNW. Good visibility becoming excellent in the middle of the day.