A westerly, moderate and variable flow prevails over the whole area.
For Penthièvre :
No gale warning.
The reliability of the situation is poor.
For the night from Wednesday to Thursday NW force 2 in the early part of the night turning W. Gusts reaching 10 knots at the end of the night.
Slight sea. Low, short swell from W. Good visibility becoming reduced by mist in the middle of the night then poor. Daytime of Thursday 17 september : The unsettled weather will become more unpredictable in the second half of the day.
Very cloudy skies with short clear spells. Some light showers from late morning. In the evening, clear periods developing.
Light showers progressively becoming less frequent. W wind force 4 continuing all day. Gusts reaching 24 knots in the middle of the day. Slight sea. Low, fairly long swell from W. Poor visibility becoming excellent in the middle of the day then poor.