San Sebastian, Spain offers 6 beaches perfect for sunbathing, surfing, swimming, and more. San Sebastian is known for its La Concha Beach, the International Film Festival, and its renowned Basque cuisine, particularly pintxos. The best time to travel to San Sebastian, Spain, is from June to September, when the average air temperature is around 70-75°F (21-24°C) and the water temperature is approximately 68-72°F (20-22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!