A southwesterly, strong and very variable flow prevails over the whole area.
For Saint-Guénolé :
No gale warning.
We are 80% sure of the situation, because the clear patches could be more numerous than forecast.
Mist and fog in the morning, overcast skies and reduced visibility in the afternoon. The risk of seeing rain will remain low. In the evening, overcast and misty, reduced visibility.
No precipitation. WSW force 4 in the morning turning SSW force 3 in the evening. Gusts reaching 19 knots in the middle of the day. Rough sea. Moderate, long swell from WSW. Visibility reduced by fog becoming reduced by mist in the middle of the day then reduced by mist.