First Mallard Branch water temperature
First Mallard Branch, Fairfield, California · Sea/Coast
The current water temperature at First Mallard Branch is 19.0 °C (as of September 21, 2026, source: USGS).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Measurement series & statistics
This measurement series includes 278 data points since July 23, 2026.
Lowest recorded value: 18.5 °C on September 6, 2026 · highest value: 24.5 °C on August 4, 2026.
In September, temperatures have ranged between 18.5 °C and 22.2 °C.
The current value is 1.3 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at First Mallard Branch right now?
The current water temperature is 19.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at First Mallard Branch?
Currently 19.0 °C (updated continuously).
How warm is at First Mallard Branch in September?
In September, the water temperature recently averaged 20.3 °C.
When is the water warmest at First Mallard Branch?
Across the measurement record, July is on average the warmest month (21.9 °C).
