A skimming screen for a swimming pool filtration system is disclosed. The skimming according to the invention includes a support frame having a central opening and a mesh fabric or screen material attached to the support frame so as to extend over substantially the entire area of the central opening. The support frame and the screen material are shaped and dimensioned to cover the intake orifice of the suction line when a strainer basket is removed for cleaning. A method of using the skimming screen to facilitate cleaning of the strainer basket is also disclosed.