Djerba in September

April through June gives you perfect weather without the crowds. Temperatures hover around 25°C, the sea warms up enough for swimming, and hotel prices stay reasonable. This is when locals take their own vacations. September through November works just as well. The water stays warm from summer, but the crushing heat breaks. October might be the sweet spot – still 28°C during the day, but comfortable evenings for walking around Houmt Souk. Summer brings serious heat. July and August see temperatures pushing 35°C, and the sirocco wind from the Sahara makes some days unbearable. But the beach clubs are in full swing, and the nightlife peaks. Winter stays mild compared to Europe – around 18°C – but many restaurants and attractions close. The island essentially hibernates from December through February. Some hotels shut down completely. Ramadan affects the island significantly. Many restaurants close during daylight hours, and the pace slows even more than usual. But the evening iftar celebrations are beautiful if you're invited to join one.