what speed wind changes breezy to windy
Â· just now. 1  The National Weather Service considers sustained wind speeds averaging between 15 and 25 MPH as 'breezy' and 20 to 30 MPH as 'windy.'. 'High wind' warnings are issued when the average sustained wind speed is at least 40 MPH for at least an hour or the wind is expected to gust at least 58 MPH. Source(s): Meteorologist. TQ Â· 5 years ago