A northeasterly and mostly variable flow prevails over the South of the basin. Over the North, it is westerly, moderate and particularly variable.
For Biarritz :
No gale warning.
For the night from Sunday to Monday SW force 1 in the early part of the night turning S. Gusts reaching 5 knots in the early part of the night.
Moderate sea. Moderate, fairly long swell from NW. Poor visibility becoming poor in the middle of the night then poor. Daytime of Monday 21 september : Warning:reduced visibility early in the day.
Sunny spells with possibility of mist forming in the morning, predominantly sunny in the afternoon. No precipitation. In the evening, lots of good clear periods.
No precipitation. S force 1 freshening NW force 3 in the middle of the day then WNW force 2. Moderate sea becoming slight in the evening. Moderate, fairly long swell from NW then low in the evening. Poor visibility becoming excellent in the middle of the day then poor.