An adjustable oscillating sprinkler (1) with a rectangular shaped frame (3) having a generally tubular shaped housing (5) rotatably attached to said frame with a nozzle strip (7) attached to the tubular housing, where the nozzle strip has a plurality of flexible nozzles, and the sprinkler also has a pivot plate (9) in contact with the nozzle strip and the tubular housing, where an adjusting element rotates the pivot plate about a radius of its longitudinal axis thereby adjusting the coverage pattern of the sprinkler.