A westerly, strong and very variable flow prevails over the whole area.
For Penthièvre :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Sunny becoming changeable in the afternoon. No precipitation. In the evening, cloudy spells, sometimes dense.
No precipitation. ENE force 2 in the morning temporarily S in the middle of the day. Gusts reaching 9 knots in the middle of the day. Moderate sea. Moderate, fairly long swell from WSW. Poor visibility becoming excellent in the middle of the day then good.