A westerly and very variable flow prevails over the whole area.
For Biarritz :
No gale warning.
For the night from Wednesday to Thursday WSW wind force 1 continuing all night. Gusts reaching 8 knots in the early part of the night.
Smooth to slight sea. Low, short swell from WNW. Poor visibility becoming poor in the middle of the night then poor. Daytime of Thursday 20 august : Warning:reduced visibility early in the day.
Sunny spells with possibility of mist forming in the morning, cloudy spells, sometimes dense, in the afternoon. Risk of showers in the morning, light showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Showers. W force 1 freshening NW force 3 in the middle of the day then becoming WNW. Slight sea. Low, short swell from NW. Poor visibility becoming excellent in the middle of the day then reduced by mist.