Advection fog is common along the California coast, forming as warm, moist air passes over the cooler ocean waters, creating dense coastal fog.

Advection fog frequently occurs along the California coast, forming when warm, moist air from the Pacific moves over the cooler coastal waters. As the air cools to its dew point, fog develops, blanketing the coast in a dense, low-lying layer. This type of fog is especially common in places like San Francisco, where it creates the city’s iconic misty mornings and reduces visibility. Advection fog cools the air along the coast, providing a unique climate that supports the region’s diverse ecosystems. Its presence influences coastal weather patterns and is an essential part of the California coastal landscape, drawing photographers and tourists alike.