Cap d Ail, France offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Cap d Ail is known for its stunning coastal path, the Sentier du Littoral, and its proximity to the luxurious Principality of Monaco. The best time to travel to Cap d'Ail, France, is from May to September, when the average air temperature is around 70-80°F (21-27°C) and the water temperature is approximately 68-75°F (20-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!