Agar obtained from the red alga Hydropuntiacornea was blended with polyvinyl alcohol (PVOH) inorder to produce biodegradable films. In this study, wecompare the properties of biopolymeric films formulatedwith agars extracted from H. cornea collected at differentseasons (rainy and dry) in the Gulf of Mexico coast andPVOH as synthetic matrix. The films were prepared atdifferent agar contents (0%, 25%, 50%, 75%, and 100%)and their optical, mechanical, thermal, and morphologicalproperties analyzed. The tensile strength of PVOH–agarfilms increased when agar content was augmented. Theformulation with 50% agar from rainy season (RS) had asignificant higher tensile strength when compared to thosefrom dry season (DS; p