Lake Monona water temperature
Lake Monona, Brittingham Beach · Lake
The current water temperature at Lake Monona is 13.4 °C (as of November 6, 2026, source: USGS · Proxy).
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 534 data points since September 7, 2026.
Lowest recorded value: 13.4 °C on November 6, 2026 · highest value: 24.9 °C on September 8, 2026.
In November, temperatures have ranged between 13.4 °C and 15.5 °C.
The current value is 1.6 °C below the November average of this series.
Nearby waters
More measuring points: Lake Monona
Frequently asked questions
Can you swim at Lake Monona right now?
The current water temperature is 13.4 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Lake Monona?
Currently 13.4 °C (updated continuously).
How warm is at Lake Monona in November?
In November, the water temperature recently averaged 15.0 °C.
When is the water warmest at Lake Monona?
Across the measurement record, September is on average the warmest month (19.7 °C).
