An easterly, moderate and variable flow prevails over the North of the basin. Over the South, it is westerly, moderate and variable.
For Penthièvre :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clear skies. In the evening, clear spells then risk of fog towards the end of the night.
No precipitation. W wind force 3 from the middle of the day. Gusts reaching 18 knots in the evening. Smooth to slight sea becoming slight in the evening. Low, short swell from WSW. Excellent visibility.