San Diego is the easiest city in this catalogue to photograph in, and that is its defining feature rather than a throwaway compliment. Daytime temperatures move within a narrow band all year, rain is rare outside a short winter season, and the coastline faces west so every evening ends over water. There is no bad season here, which means no rush and no premium week.
The market has a shape the weather does not explain. This is a large military city, and homecoming, deployment and promotion photography is a real and constant category. Alongside it sits year-round beach family work, a strong vacation-session market, and the Balboa Park architecture that makes the city look like nowhere else in California.
Tides matter more here than in any other city on this list. Sunset Cliffs and the La Jolla tide pools are largely inaccessible at high water, so a coastal session is scheduled against a tide table rather than only against sunset.