This dataset contains daily measurements of the free surface level (absolute elevation, m a.s.l.) of Lake Chimaditida, located in Western Macedonia, Greece. Measurements span from January 1, 2024 to February 25, 2026 (787 records). The water level values range between 590.68 m and 591.40 m above sea level. Lake Chimaditida is a Ramsar-listed shallow freshwater lake of significant ecological importance.