A new and distinct variety of nectarine tree, denominated `UFRoyal`, has a low winter chilling requirement estimated at 250 chill units (cu). The tree is medium size and moderately vigorous with a semi-spreading growth habit. It produces showy, pink flowers and small reniform leaf glands. Trees of `UFRoyal` are self-fertile and regularly bear heavy annual crops of early season fruit that are large for its ripening season. Fruit are uniformly firm and yellow with non-melting flesh which are clingstone. Fruit are oval, and uniform with substantially symmetrical shape, and have an attractive 90 to 100% bright red skin. The fruit of `UFRoyal` ripen about 1 week before `UFQueen` nectarine in early May at Gainesville, Fla.