A northwesterly, very strong and very variable flow prevails over the whole area.
For Penthièvre :
Warning moderate gale offshore.
The reliability of the situation is assessed at 75%.
Very cloudy in the morning, overcast skies in the afternoon. Some showers from late morning. In the evening, overcast skies.
Spells of light rain during the night. WSW force 5 becoming SW force 6 in the middle of the day then WSW force 7. Gusts reaching 45 knots in the evening. Slight sea becoming moderate in the middle of the day. Low, fairly long swell from WSW. Excellent visibility.