A westerly, very strong and variable flow prevails over the whole area.
For Penthièvre :
Warning strong breeze offshore.
We are 90% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.
Very cloudy skies to overcast. No precipitation. In the evening, overcast skies.
Risk of showers in the early hours. WSW wind force 5 from the middle of the day. Gusts reaching 30 knots in the evening. Rough sea. Moderate, fairly long swell from WSW. Excellent visibility.