Global studies have investigated plastic polymer distribution, but few have investigated the drivers of polymer deposition. Little work has been done in Australia, particularly on Western Australian beaches. In 2018, Wow Ecotours collected daily plastic samples from Shelley Beach on the south coast of Western Australia. A subset of 873 items were taken from the collection, which had been sorted into five different density categories with densities ranging from <0.8 to 1. In this study, the polymer type of 10 items from each density category from each sampling day was identified using Raman Spectrometry. The most abundant polymer was high-density polyethylene 45%, followed by polypropylene and low-density polyethylene, with 33.5% and 14%, respectively. The relationship between polymer type and onshore/offshore/alongshore wind direction was examined to determine if there was a relationship. Onshore wind was the dominant factor driving plastic accumulation onto the beach, but this did not vary significantly between polymers. Plastic size was important in spring, causing more variation in the length, mass, and area of the items. The polymer profile was not substantially different from other global investigations.