Ounasjärvi water temperature
Ounasjärvi, Enontekiö · Lake
The current water temperature at Ounasjärvi is 4.7 °C (as of October 15, 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 August 18, 2026.
Lowest recorded value: 4.7 °C on October 15, 2026 · highest value: 14.4 °C on August 18, 2026.
In October, temperatures have ranged between 4.7 °C and 8.5 °C.
The current value is 2.4 °C below the October average of this series.
Nearby waters
Frequently asked questions
Can you swim at Ounasjärvi right now?
The current water temperature is 4.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Ounasjärvi?
Currently 4.7 °C (updated continuously).
How warm is at Ounasjärvi in October?
In October, the water temperature recently averaged 7.1 °C.
When is the water warmest at Ounasjärvi?
Across the measurement record, August is on average the warmest month (13.6 °C).
