An easterly, moderate and variable flow prevails over the whole area.
For Castro Urdiales :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Sunny despite some cloudy spells but no rain. In the evening, good clear periods but cloud building.
Risk of showers in the early hours. ENE force 2 in the morning turning N in the evening. Gusts reaching 12 knots in the evening. Slight sea. Low, fairly long swell from N. Excellent visibility becoming excellent in the middle of the day.