His artistic approach focused on the intersection of nature and classical architecture. In works like Roman Ruins in a Wooded Landscape and Hunters Near Ruins, he placed figures and animals amongst crumbling stone. Weenix was skilled at painting textures, particularly the fur of animals in pieces such as Liggende bok or Liggend schaap met vastgebonden poten. He frequently used a warm palette to evoke the atmosphere of the Roman Campagna.

Modern collectors find value in the architectural precision and atmospheric quality of his prints. These works provide a sense of history without being overly formal. The combination of rural scenes and classical structures creates a balanced aesthetic for home decor. His depictions of hunting trophies and Mediterranean ports remain popular for their technical skill and clear compositions.