For Castelldefels :
No gale warning.
We are 85% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.
Fairly clear skies progressively clouding over in the morning, very cloudy with possibility of thunder storms in the afternoon. No precipitation in the morning, possibility of showers in late afternoon. In the evening, changeable skies with risk of storms.
Possibility of showers W force 2 turning S force 3 in the middle of the day then SSW force 2. Gusts reaching 15 knots from the middle of the day. Smooth sea. Low, short swell from SSE. Excellent visibility becoming excellent in the middle of the day.