A water trough window seal trim assembly for preventing water leakage includes a plurality of trim sections comprising a top trim section, a left trim section, and a right trim section. Each of the plurality of trim sections comprises a bottom piece, an exterior perpendicular piece, an interior perpendicular piece, and a parallel piece. The bottom piece has an exterior end, an interior end, a top face, and a bottom face. The exterior perpendicular piece is perpendicularly coupled to the top face at the exterior end. The interior perpendicular piece is perpendicularly coupled to the top face proximal the interior end. The parallel piece is perpendicularly coupled to each of the exterior perpendicular piece and the interior perpendicular piece to form a water trough. A pair of corner connectors perpendicularly couples each of the left trim section and the right trim section to the top trim section.