No. Speed of a body is the overall distance travelled per unit time; irrespective of its direction. Velocity of a body is the overall displacement occured per unit time; with regard to its direction. If the direction does not change, the distance travelled and displacement occured are same which makes average speed and velocity equal to each other. But if the direction changes during the motion, distance and displacement differ, which gives different values of average speed and velocity.
[Read: Motion in a Straight Line]