The U.S. Geological Survey (USGS) Coral Reef Ecosystems Studies (CREST) project (https://coastal.er.usgs.gov/crest/) provides science that helps resource managers tasked with the stewardship of coral reef resources. This data release provides underwater temperature data recorded every fifteen minutes since 2019 at three coral reef locations in St. Croix, U.S. Virgin Islands. The sites are on the fringing reef of the National Park Service’s Buck Island Reef National Monument: Northwest Reef (NWR), ...