Foggiest City on the U.S. East Coast? (Spoiler: It's Not on the East Coast)

San Francisco is the foggiest major city in the United States—but it's on the West Coast.

East Coast Fog Champions

If we restrict to the Atlantic seaboard, the top contenders are:

Why the Confusion?

San Francisco's iconic fog (Karl the Fog) dominates pop culture. East Coast fog is real but less cinematic—mostly radiation fog (clear nights) or advection fog (warm air over cool shelf water), not the persistent marine layer of California.

True East Coast Fog Capital?

St. John's, Newfoundland (Canada) — 126+ days. In the U.S., Boston and Norfolk lead major cities. But no East Coast city rivals SF's frequency or cultural association.