We use a kilometer-scale regional climate model to investigate the occurrence and intensity of sea-effect snowfall in the Baltic Sea region during 1998–2018. Sea-effect snowbands occur most frequently from November to February and when low-level winds have an easterly component near the eastern coast of Sweden and the southern coast of Finland. Over the southern Baltic Sea, snowbands tend to occur under northerly low-level winds and are most common from December to March.