The U.S. Geological Survey (USGS) provides Level-2 Provisional Aquatic Reflectance (AR) Products through EROS Science Processing Architecture (ESPA) On-Demand Interface for the Collection 2 Landsat 8-9 archive. This dataset includes n=742 provisional AR products for the visible and near-infrared (VNIR) bands for the Operational Land Imager (OLI) sensor at 30 meters resolution coincident with same-day in situ radiometric measurements from coastal validation platforms (AERONET-OC) and community driven records (GLORIA). This dataset is intended to be used as a reference during future Collection reprocessing events and to track any algorithmic changes to the provisional aquatic reflectance image processing pipeline.