For Viana do Castelo :
No gale warning.
For the night from Tuesday to Wednesday NNE force 3 in the early part of the night becoming force 2.
Moderate sea becoming slight in the middle of the night. Low, fairly long swell from NW. Good visibility becoming good in the middle of the night then good. Daytime of Wednesday 26 august : The weather will become more uncertain during the day.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. The risk of seeing rain will remain low. In the evening, cloudy spells, sometimes dense.
Chance of light rain. NNW force 2 becoming NW force 3 in the middle of the day then NNW. Gusts reaching 13 knots in the evening. Slight sea. Low, fairly long swell from NW. Good visibility becoming excellent in the middle of the day.