A southwesterly, strong and very variable flow prevails over the whole area.
For Penthièvre :
No gale warning.
We are 85% sure of the situation, because the clear patches could be more numerous than forecast.
Mist and fog. Risk of some spots of rain in the morning, possibility of showers in the afternoon. In the evening, low cloud developing into fog.
No precipitation. WSW force 3 in the morning temporarily force 4 in the middle of the day. Gusts reaching 19 knots in the middle of the day. Moderate sea. Moderate, fairly long swell from WSW. Visibility reduced by fog becoming poor in the middle of the day then reduced by fog.