Seawater temperature was recorded every five minutes between October and November 2024 in McMurdo Sound, Ross Sea, Antarctica. Measurements were taken at depths ranging from 9.5 to 29 metres to characterize the early summer temperature regime of the benthic community. Data were collected using a HOBO TidbiT v2 underwater data logger with an accuracy of ±0.2°C. The logger was mounted on an aluminium frame, which was deployed by scientific divers during the study period. These high-resolution temperature recordings provide insights into the thermal environment shaping McMurdo Sound benthic ecosystems in the Antarctic summer.