Average monthly wind speed in Cape Town

The mean monthly wind speed over the year in Cape Town (Western Cape), South Africa.

The mean wind speed in Cape Town over the year fluctuates between 3 m/s (6 knots) and 6 m/s (12 knots).

The 3 m/s (6 knots) average wind speed in May and June 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 time of year, January sees average wind speeds of 6 m/s (12 knots). This means most days have strong breezes that make entire trees sway and make umbrellas difficult to control. Wind pressure is clearly felt. The speed translates to 21.6 kilometers per hour or 13.4 miles per hour. While some moments are calmer or more intense, windy conditions dominate this period.

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