San Felipe in the Mexican state of Baja California is located 190 km south of the international border at Mexicali (connecting with Calexico, California, USA). It is located in the municipio ("municipality") of Mexicali. Temperatures in San Felipe average year around approximately 24°C. The 7 m tides expose a kilometer of ocean floor. In fact San Felipe experiences one of the largest tidal bores in the world due, in part, to the Colorado River delta to the north. The Port of San Felipe is a small town that has traditionally depended on fishing as their economic base. San Felipe is located in a unique ecosystem, where the desert meets the sea. Temperatures have ranged from 46°C in the shade during the summer months of July and August and, in December and January, the temperature can get to a low of about 4°C at night. The altitude of the Bay of San Felipe is 3 meters above sea level (or about 10 ft.). The population of San Felipe is estimated at 20,000 people. This number can increase by up to 5,000 depending on part-time residents (retirees & vacation homeowners) or popular weekends such as Spring Break or Memorial Day.