Gjersjøen water temperature
Gjersjøen · Lake
The current water temperature at Gjersjøen is 11.1 °C (as of October 16, 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 386 data points since August 17, 2026.
Lowest recorded value: 10.8 °C on October 14, 2026 · highest value: 20.6 °C on August 27, 2026.
In October, temperatures have ranged between 10.8 °C and 14.9 °C.
The current value is 1.9 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Gjersjøen right now?
The current water temperature is 11.1 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Gjersjøen?
Currently 11.1 °C (updated continuously).
How warm is at Gjersjøen in October?
In October, the water temperature recently averaged 13.0 °C.
When is the water warmest at Gjersjøen?
Across the measurement record, August is on average the warmest month (19.2 °C).
