For Biarritz :
No gale warning.
For the night from Thursday to Friday W wind force 2 continuing all night. Gusts reaching 9 knots in the early part of the night.
Slight sea. Low, fairly long swell from WNW. Good visibility becoming poor in the middle of the night then poor. Daytime of Friday 21 august : The unstable weather will die away during the day.
Good clear periods alternating with cloudy spells, sometimes dense. Some light showers in the morning, possibility of showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Light showers. W force 2 in the morning becoming WNW force 3 in the middle of the day. Gusts reaching 12 knots in the evening. Slight sea. Low, fairly long swell from WNW. Poor visibility becoming good in the middle of the day then good.