Average monthly water temperature in South San Francisco, the United States of America
On this page you find the mean water temperature over the year in South San Francisco (California), the United States of America. Dive into the water temperature trends, highlighting the best times for swimming and other activities.
Water temperatures in South San Francisco stay on the cooler side throughout the year. The warmest month, June, averages 14°C (57°F).
The coldest water temperature month is January, averaging 12°C (54°F). These cooler conditions are not the best for swimming enthusiasts.