Zumaia, Spain offers 11 beaches perfect for sunbathing, surfing, swimming, and more. Zumaia is known for its stunning Flysch rock formations along the Basque Coast Geopark. The best time to travel to Zumaia, 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!