For Dinan-Lanvallay :
No gale warning.
For the night from Wednesday to Thursday NNW force 3 in the early part of the night becoming NW force 2. Gusts reaching 13 knots in the early part of the night.
Slight sea. Low from N. Excellent visibility becoming good in the middle of the night then good. Daytime of Thursday 20 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of some spots of rain in the morning, possibility of showers in late afternoon. In the evening, cloudy spells, sometimes dense.
Chance of light rain. NW force 2 in the morning becoming NNW force 3 in the middle of the day. Gusts reaching 15 knots in the evening. Slight sea. Low from N then from NW in the middle of the day then from NW. Good visibility becoming excellent in the middle of the day.