South Bay is a region in southwestern San Diego County, California consisting of the cities and unincorporated communities of Bonita, Chula Vista, Lincoln Acres, National City, and South San Diego. South East San Diego is Located in the center of one of the most culturally rich, economically promising, and environmentally diverse places in the United States. South Bay San Diego is one of the most desirable places to live for professionals, families, and military personnel. with more than 50 square miles of coastal landscape, canyons, rolling hills, mountains, quality parks, and miles of trails. If you are from Southern California, you know how great the weather is year-round. South Bay San Diego offers temperate weather, perfect for the outdoor enthusiast looking to hike, cycle, or kayak. The beauty of this area is inescapable.