A southwesterly, very strong and very variable flow prevails over the whole area.
For Plage de Port Biren :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Skies very cloudy to overcast in the morning, cloudy spells, sometimes dense, in the afternoon. No precipitation. In the evening, good clear periods but cloud building.
No precipitation. SSW force 4 in the morning turning WSW in the evening. Gusts reaching 26 knots from the middle of the day. Smooth to slight sea. Low, fairly long swell from WSW. Excellent visibility becoming excellent in the middle of the day.