Gjersjøen water temperature
Gjersjøen · Lake
The current water temperature at Gjersjøen is 15.5 °C (as of September 20, 2026, source: official monitoring networks).
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 725 data points since July 22, 2026.
Lowest recorded value: 15.5 °C on September 20, 2026 · highest value: 21.6 °C on August 15, 2026.
In September, temperatures have ranged between 15.5 °C and 19.5 °C.
The current value is 2.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Gjersjøen right now?
The current water temperature is 15.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Gjersjøen?
Currently 15.5 °C (updated continuously).
How warm is at Gjersjøen in September?
In September, the water temperature recently averaged 17.6 °C.
When is the water warmest at Gjersjøen?
Across the measurement record, July is on average the warmest month (20.1 °C).
