Watermelon season typically runs from May through September in the United States. The peak time for the best flavor and ripeness is usually between June and August, with July and August often being the sweetest and juiciest months. This timing varies slightly by region, with early-season watermelons coming from places like Florida in April to May, and late summer watermelons from California and Arizona around July to September. Outside the peak season, watermelons found in stores are often imported and may not be as fresh or flavorful. For the best taste, look for watermelons during these months, as they are naturally ripened and at their freshest.
In Spain, watermelon season is similar, starting around April or May and lasting until September or October, with peak availability in the summer months.