Average monthly water temperature in Williamstown, Australia
On this page you find the mean water temperature over the year in Williamstown (Victoria), Australia. Understand how water temperatures vary throughout the year.
Water temperatures in Williamstown stay on the cooler side throughout the year. The warmest month, January, averages 17°C (63°F).
The coldest water temperature month is August, averaging 13°C (55°F). These cooler conditions are not the best for swimming enthusiasts.