The affected sectors are Landiras and La Teste-de-Buch, where 10,000 people, including tourists, have been evacuated, according to authorities.
The scenario is challenging, as the drought joins the heat wave in France, and the winds threaten to complicate it even more over the weekend.
Experts are investigating the origin of the fires, and Interior Minister Gerald Darmanin warned during a visit to the area that nine of 10 fires are usually caused by humans.
Firefighters are using technical devices and aircraft to put out the flames.
No deaths or damages to infrastructure have been reported in Landiras and La Teste-de-Buch.