A northwesterly, weak and particularly variable flow prevails over the whole area.
For Penthièvre :
No gale warning.
For the night from Friday to Saturday NW force 3 in the early part of the night becoming force 2. Gusts reaching 14 knots in the early part of the night.
Slight sea. Low, short swell from W. Poor visibility temporarily in the middle of the night. Daytime of Saturday 12 september : The sky will remain changeable.
Skies changeable to very cloudy. Risk of some spots of rain in the morning, possibility of showers in the afternoon. In the evening, clear periods developing.
Possibility of showers NW force 2 becoming WNW force 3 in the middle of the day then NNW. Gusts reaching 15 knots in the evening. Slight sea. Low, short swell from W. Poor visibility becoming excellent in the middle of the day then good.