Water temperature at time series station Arrival Heights Dive Hole, McMurdo Sound, Ross Sea, Antarctica from October 2024 until November 2025

Seawater temperature was recorded every 15 minutes between October 2024 and November 2025 in McMurdo Sound, Ross Sea, Antarctica. Measurements were taken at 25 metres to characterize the temperature regime of the benthic community over the course of a year. Data were collected using a HOBO TidbiT v2 underwater data logger with an accuracy of ±0.2°C. The logger was mounted by scientific divers on the ground next to a large glass sponge (Anoxycalyx joubini). These high-resolution temperature recordings provide insights into the thermal environment shaping McMurdo Sound benthic ecosystems over the course of one year.