Average monthly wind speed in San Francisco (CA)

On this page you will find more information about the mean monthly wind speed over the year in San Francisco (California), the United States of America.

The average annual wind speed in San Francisco spans from 3 m/s (6 knots) to 7 m/s (14 knots).

The 3 m/s (6 knots) average wind speed in January, November and December brings moderate air movement. Conditions can vary throughout the month, with some days experiencing stronger winds and others remaining calm. At this average speed, leaves and small branches move steadily, and flags show continuous motion. This equates to about 11 kilometers per hour or 6.7 miles per hour.

The windiest period, June and July has average wind speeds of 7 m/s (14 knots). This means typical days feature strong gusts that create resistance when walking and make large trees sway noticeably. Wind becomes a constant factor. The speed translates to 25.2 kilometers per hour or 15.7 miles per hour. While intensity varies throughout the day, consistently strong winds are the norm.

For more detailed information about San Francisco’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our San Francisco climate page.