With a population of around 1,000, Bomarsund sits in Alands landsbygd, AX. The city operates in the Europe/Mariehamn time zone.
In 2025, Bomarsund recorded an average annual temperature of 47°F. The hottest temperatures reached 80°F in July; the coolest were 15°F in January. Total precipitation for the year was 26 inches, with the wettest month being September. Snowfall for the year totaled approximately 7 inches.
View current conditions and forecast for Bomarsund · More cities in Alands landsbygd