South China Sea water temperature
South China Sea, Nha Trang · Sea/Coast
The current water temperature at South China Sea is 29.6 °C (as of September 20, 2026, source: Open-Meteo marine model).
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 609 data points since July 22, 2026.
Lowest recorded value: 28.1 °C on July 22, 2026 · highest value: 30.3 °C on August 17, 2026.
In September, temperatures have ranged between 28.1 °C and 30.1 °C.
The current value is 0.5 °C above the September average of this series.
More measuring points: South China Sea
Frequently asked questions
Can you swim at South China Sea 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 South China Sea?
Currently 29.6 °C (updated continuously).
How warm is at South China Sea in September?
In September, the water temperature recently averaged 29.1 °C.
When is the water warmest at South China Sea?
Across the measurement record, August is on average the warmest month (29.4 °C).
