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The influence of welding speed on the properties of friction stir welded aluminium alloy 5083 was explored. The effects of various welding regimes on the defect formation, hardness distribution, tensile strength, and bending strength of the joint were experimentally investigated. Kissing bond defects were prevalent in the joint, however, this kissing bond was eliminated at high welding rates. The welded zone was softened significantly; all the tensile specimens were fractured in the welding zone with shear mode. The tensile strength of the joint reached 85% of the base aluminium alloy 5083 while the bending ductility of the joint was higher than that of base aluminium alloy 5083.