A westerly, very strong and mostly variable flow prevails over the whole area.
For Plestin :
Warning moderate gale.
Very cloudy with risk of thunderstorms in the morning, skies clearing but storms likely in the afternoon. Some light showers in the morning, possibility of showers in the afternoon. In the evening, very cloudy with risk of storms.
Possibility of showers WSW force 6 in the morning becoming force 7 in the middle of the day. Gusts reaching 37 knots in the evening. Rough sea. Low, fairly long swell from WNW. Excellent visibility.