A washing machine appliance and nozzle assembly is provided herein. The washing machine appliance may include a cabinet, a tub positioned within the cabinet, a wash basket, and a nozzle assembly. The nozzle assembly may be mounted within the cabinet and configured to provide wash fluid to the tub. The nozzle assembly may include an extendable nozzle, a supply line, and a nozzle valve. The extendable nozzle may be movable between retracted and extended positions. The extendable nozzle may define a fluid path extending in fluid communication between a nozzle inlet and a nozzle outlet. The supply line may extend to the extendable nozzle in fluid communication therewith to provide a flow of wash fluid to the extendable nozzle. The nozzle valve may be positioned within the extendable nozzle in fluid communication with the supply line upstream from the nozzle outlet.