Alster water temperature
Alster · Lake
The current water temperature at Alster is 10.3 °C (as of October 24, 2026, source: Badegewässer Hamburg (BUE/BUKEA)).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
Measurement series & statistics
This measurement series includes 122 data points since August 25, 2026.
Lowest recorded value: 10.3 °C on October 24, 2026 · highest value: 20.2 °C on August 27, 2026.
In October, temperatures have ranged between 10.3 °C and 17.2 °C.
The current value is 4.1 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Alster right now?
The current water temperature is 10.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Alster?
Currently 10.3 °C (updated continuously).
How warm is at Alster in October?
In October, the water temperature recently averaged 14.4 °C.
When is the water warmest at Alster?
Across the measurement record, August is on average the warmest month (19.5 °C).
