An adjustable trocar washer is provided to facilitate sealing an incision in skin. The adjustable trocar washer is configured for use with a trocar or cannula assembly. The adjustable trocar washer generally includes a compressible collar and a skirt formed at the distal end of the compressible collar for sealing an incision in skin. The compressible collar is longitudinally movable along an elongate tubular member associated with the trocar or cannula assembly. A latch mechanism is provided on the compressible collar to secure the collar in a compressed condition about the elongate tubular member.