The approximate wind speed of Jupiter’s Great Red Spot is 430 kilometers per hour. More precise measurements commonly place the fastest winds around the storm’s edge at roughly 432 kilometers per hour, making 430 km/h an appropriate rounded answer.
The Great Red Spot is a gigantic, persistent high-pressure storm located about 22 degrees south of Jupiter’s equator. It rotates counterclockwise in the planet’s Southern Hemisphere and is confined between powerful eastward and westward jet streams.
Wind speeds are not uniform throughout the storm. The strongest currents occur around its perimeter, while material inside the central region moves much more slowly. Some measurements give peak speeds approaching 496 km/h, depending on the location, altitude, and method of measurement; that variation is why trivia references often use an approximate figure near 430 km/h.
The Great Red Spot has also changed over time. Its size and rotation rate have declined in modern observations, although it remains the largest persistent atmospheric vortex known in the Solar System.