San Javier, Spain offers 25 beaches perfect for sunbathing, surfing, swimming, and more. San Javier is known for the San Javier International Jazz Festival and the Mar Menor lagoon. The best time to travel to San Javier, Spain, is from May to September, with average air temperatures ranging from 25°C to 30°C (77°F to 86°F) and water temperatures around 22°C to 26°C (72°F to 79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!