思韦茨冰川是南极洲的冰川，位于玛丽伯德地的沃尔格林海岸，最终注入阿蒙森海，以威斯康辛大学麦迪逊分校的地质学家命名，现时由南极条约体系管理。

Thwaites Glacier (75°30′S 106°45′W / 75.500°S 106.750°W / -75.500; -106.750) is an unusually broad and fast Antarctic glacier flowing into Pine Island Bay, part of the Amundsen Sea, east of Mount Murphy, on the Walgreen Coast of Marie Byrd Land. Its surface speeds exceed 2 km/yr near its grounding line, and its fastest flowing grounded ice is centred between 50 and 100 km east of Mount Murphy. It was named by ACAN after Fredrik T. Thwaites, a glacial geologist, geomorphologist and professor emeritus at the University of Wisconsin–Madison. Thwaites Glacier drains into West Antarctica’s Amundsen Sea and is closely watched for its potential to raise sea levels.