Meteo Balkans Explains Fog Formation over the Black Sea

Numerous inquiries to Meteo Balkans have prompted their experts to explain the reason for the cold weather and fog along the Bulgarian Black Sea coast. According to meteorologists, the phenomenon is known as "sea advection fog" and forms when warm, humid air moves over a significantly colder surface, such as the current sea water temperature. Upon contact of the warm air with the cold water, it cools down. Reaching its saturation point (dew point), condensation forms, resulting in fog. Inland, temperatures rise rapidly in spring, reaching 20-25°C, while the Black Sea remains cold (around 10°C). Warm air coming from the south or southwest cools down sharply upon contact with the sea surface. This leads to condensation and the formation of dense fog, which persists in calm weather. The phenomenon is typical for spring due to the large temperature difference between the air and the water.