St. Johns River water temperature
St. Johns River, Jacksonville, Florida · River
The current water temperature at St. Johns River is 23.7 °C (as of November 5, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 437 data points since September 7, 2026.
Lowest recorded value: 15.1 °C on October 20, 2026 · highest value: 31.0 °C on September 11, 2026.
In November, temperatures have ranged between 21.9 °C and 23.8 °C.
The current value is 1.2 °C above the November average of this series.
Nearby waters
More measuring points: St. Johns River
Frequently asked questions
Can you swim at St. Johns River right now?
The current water temperature is 23.7 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at St. Johns River?
Currently 23.7 °C (updated continuously).
How warm is at St. Johns River in November?
In November, the water temperature recently averaged 22.5 °C.
When is the water warmest at St. Johns River?
Across the measurement record, September is on average the warmest month (29.0 °C).
