Reference data analysis
What the year comparison shows for Lake Brienz
Typical low point
563.24 m a.s.l.
February 18
Typical high point
564.29 m a.s.l.
July 7
Typical range
104 cm
Difference between daily medians
In the 1991-2020 reference period, Lake Brienz's seasonal median is lowest on February 18 at 563.24 m a.s.l. and highest on July 7 at 564.29 m a.s.l.. The difference between these typical points is 104 cm. This describes the average seasonal cycle, not the largest individual fluctuation.
The 2026 curve currently contains 265 calendar days. On September 22 it shows 563.79 m a.s.l., which is 11 cm below that calendar day's median of 563.90 m a.s.l.. Compared with the same calendar day in 2025, the value is 19 cm lower.
Within the 1991-2020 reference period, the envelope reaches its highest value of 566.05 m a.s.l. on August 23 and its lowest value of 562.85 m a.s.l. on March 1. These are extremes of the displayed reference period, not all-time records.
The analysis uses the water-level series from Ringgenberg. Matching calendar days are compared, and the median is the middle value of the reference years. This classification does not replace flood warnings or local safety information.