There are nine beaches along the Mediterranean Sea beginning at Torre de Sant Sebastià and strolling northeast. They are defined by stone piers. Frankly, they feel like a continuous, three-mile stretch of surf. Locals know the farther you walk, the further you distance yourself from the crowds and the better the sand. Barceloneta Beach is the most popular, especially during the summer months when the water temperature reaches 75°F. That may sound nippy. However, taking a dip is the perfect way to cool off when the thermometer often exceeds 90°F in July and August.