Osoyoos Lake water temperature
Osoyoos Lake, Oroville, Washington · Lake
The current water temperature at Osoyoos Lake is 19.9 °C (as of September 21, 2026, source: USGS).
Lakes stratify in summer: bathing-warm on top, markedly colder a few metres down. Measurements are taken at the surface — right where you swim.
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Measurement series & statistics
This measurement series includes 434 data points since July 23, 2026.
Lowest recorded value: 19.6 °C on September 15, 2026 · highest value: 27.4 °C on July 24, 2026.
In September, temperatures have ranged between 19.6 °C and 23.7 °C.
The current value is 1.3 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Osoyoos Lake right now?
The current water temperature is 19.9 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Osoyoos Lake?
Currently 19.9 °C (updated continuously).
How warm is at Osoyoos Lake in September?
In September, the water temperature recently averaged 21.2 °C.
When is the water warmest at Osoyoos Lake?
Across the measurement record, July is on average the warmest month (24.4 °C).
