A southwesterly, moderate and very variable flow prevails over the whole area.
For Saint-Brevin-Les-Pins :
No gale warning.
The reliability of the situation is poor.
For the night from Wednesday to Thursday W force 1 turning NE in the middle of the night then E force 2.
Slight sea. Low, fairly long swell from W. Visibility reduced by mist becoming reduced by mist in the middle of the night then reduced by fog. Daytime of Thursday 21 may : Warning:reduced visibility early in the day.
Sunny spells with possibility of mist forming in the morning, sunny in the afternoon. No precipitation. In the evening, skies with few clouds.
E force 3 in the morning becoming force 2 in the evening. Gusts reaching 12 knots until the middle of the day. Slight sea. Low, fairly long swell from W. Visibility reduced by fog becoming excellent in the middle of the day.