For Dinan-Lanvallay :
No gale warning.
For the night from Friday to Saturday N force 3 becoming NNE force 2 in the middle of the night then force 1. Gusts reaching 12 knots in the early part of the night.
Smooth to slight sea becoming smooth in the middle of the night. Low from N. Excellent visibility becoming excellent in the middle of the night then excellent. Daytime of Saturday 22 august : The weather will become more uncertain during the day.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. The risk of seeing rain will remain low. In the evening, cloud and long sunny periods.
No precipitation. NNE force 1 becoming N force 2 in the middle of the day then force 3. Gusts reaching 16 knots in the evening. Smooth sea becoming smooth to slight in the middle of the day. Low from N. Good visibility becoming excellent in the middle of the day.