Malvarrosa Beach in October

May through October gives you swimmable water and reliable sunshine. July and August see temperatures hit 30°C, perfect for beach days but expect crowds – arrive before 10am for prime spots. June and September offer the sweet spot: warm water (22-24°C), fewer tourists, and restaurant tables you don't need to fight for. October surprises visitors with 25°C days and calm seas, though evenings get chilly. The beach stays open year-round, and locals swim through November, but winter waves can be rough. Las Fallas festival in March brings massive crowds to Valencia, making beach accommodation scarce and expensive.