A northerly and mostly variable flow prevails over the whole area.
For Plage d"Hendaye :
No gale warning.
For the night from Thursday to Friday NW force 2 in the early part of the night turning W. Gusts reaching 8 knots all night.
Slight sea. Low, short swell from NW. Excellent visibility becoming good in the middle of the night then good. Daytime of Friday 21 august : The atmosphere will remain unstable.
Skies changeable to very cloudy. Light showers all day. In the evening, cloudy spells, sometimes dense.
Light showers. W force 2 turning NNW force 3 in the middle of the day then NW. Slight sea. Low, short swell from NW. Good visibility becoming excellent in the middle of the day then excellent.