San Diego, located in Southern California, is a city known for its pleasant climate, diverse landscapes, and abundant outdoor recreation opportunities. The city enjoys a Mediterranean climate, characterized by mild, dry summers and cool, wet winters. Average temperatures range from 50°F (10°C) in winter to 80°F (27°C) in summer, making it an ideal place for outdoor activities year-round.

San Diego's hydrology is shaped by its proximity to the Pacific Ocean. The city is home to several water bodies, including San Diego Bay and the Pacific coastline. The area's hydrology also includes various rivers and streams that flow from the nearby mountains, providing water resources for the region.

Outdoor enthusiasts can indulge in a wide range of activities in San Diego. The city boasts over 70 miles of beautiful coastline, offering opportunities for swimming, sunbathing, and surfing. Hiking enthusiasts can explore the numerous trails in the nearby mountains, such as Torrey Pines State Natural Reserve and Mission Trails Regional Park. San Diego's diverse landscapes also provide opportunities for biking, fishing, boating, and golfing. With its pleasant climate, stunning natural beauty, and water-based activities, San Diego offers a plethora of outdoor recreation options for locals and tourists alike.