A northerly, weak and particularly variable flow prevails over the whole area.
For Castro Urdiales :
No gale warning.
For the night from Sunday to Monday WNW wind force 2 continuing all night. Gusts reaching 9 knots from the middle of the night.
Slight sea. Low, short swell from NNW. Good visibility becoming poor in the middle of the night. Daytime of Monday 17 august : The unstable weather will die away during the day.
Skies changeable to very cloudy. Some light showers in the morning, showers late in the day. In the evening, cloudy spells, sometimes dense.
Light showers. W force 2 turning NNW force 3 in the middle of the day then NW force 2. Gusts reaching 11 knots in the middle of the day. Slight sea. Low, short swell from NNW. Poor visibility temporarily in the middle of the day.