How fast are sail boats MPH?

Sailboats can vary significantly in speed depending on their design, size, and wind conditions. On average, cruising sailboats typically sail at speeds between 4 to 8 knots, which translates to approximately 4.6 to 9.2 miles per hour (MPH). Racing sailboats, however, can reach speeds of 15 knots (about 17.3 MPH) or more in optimal conditions. The fastest recorded sailboats can exceed 30 knots (34.5 MPH) under ideal circumstances.