Ounasjärvi water temperature
Ounasjärvi, Enontekiö · Lake
The current water temperature at Ounasjärvi is 9.9 °C (as of September 19, 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 59 data points since July 23, 2026.
Lowest recorded value: 9.9 °C on September 19, 2026 · highest value: 15.6 °C on July 31, 2026.
In September, temperatures have ranged between 9.9 °C and 13.8 °C.
The current value is 1.8 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Ounasjärvi right now?
The current water temperature is 9.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ounasjärvi?
Currently 9.9 °C (updated continuously).
How warm is at Ounasjärvi in September?
In September, the water temperature recently averaged 11.7 °C.
When is the water warmest at Ounasjärvi?
Across the measurement record, July is on average the warmest month (15.0 °C).
