St. Johns River water temperature
St. Johns River, Dancy Point near Spuds, Florida · River
The current water temperature at St. Johns River is 29.3 °C (as of September 21, 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 91 data points since July 23, 2026.
Lowest recorded value: 29.2 °C on August 4, 2026 · highest value: 32.0 °C on August 16, 2026.
In September, temperatures have ranged between 29.3 °C and 30.7 °C.
The current value is 0.6 °C below the September 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 29.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at St. Johns River?
Currently 29.3 °C (updated continuously).
How warm is at St. Johns River in September?
In September, the water temperature recently averaged 29.9 °C.
