Dillon Beach is temperate and accessible to campers year-round. California coast mornings are often foggy and damp, even in summer before the sun comes out and highs are in the 60s. It’s a good idea to bring a jacket and rain gear year-round. If you plan to visit Dillon Beach on a warm summer’s day, be prepared to deal with crowds and notoriously bad traffic. Winter visitors can expect temps in the mid-40s and the possibility of rain, but may be rewarded with fewer crowds. Spring wildflowers are most abundant in March and April.