Mississippi Sound at Usgs Round Island Light, Mississippi water temperature
Mississippi Sound at Usgs Round Island Light, Mississippi · Sea/Coast
The current water temperature at Mississippi Sound at Usgs Round Island Light is 29.6 °C (as of September 20, 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 112 data points since August 26, 2026.
Lowest recorded value: 29.0 °C on August 28, 2026 · highest value: 32.6 °C on September 7, 2026.
In September, temperatures have ranged between 29.2 °C and 32.6 °C.
The current value is 1.1 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Mississippi Sound at Usgs Round Island Light right now?
The current water temperature is 29.6 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Mississippi Sound at Usgs Round Island Light?
Currently 29.6 °C (updated continuously).
How warm is at Mississippi Sound at Usgs Round Island Light in September?
In September, the water temperature recently averaged 30.7 °C.
