This dataset was collected as part of the project The Impacts of Ocean Fine-Scale Whirls on Climate and Ecosystems (WHIRLS) (https://www.whirls.eu/). Seaglider SG675 (SG675.zip) This dataset contains raw profiles of temperature, salinity, dissolved oxygen, fluorescence, and optical backscatter collected by Seaglider SG675. The glider was deployed in the Cape Basin from 16 September 2025 to 9 November 2025. The raw data have been calibrated using the Kongsberg Seaglider Basestation V3 processing code. Post-deployment compass calibration was conducted to ensure accurate vehicle heading data. Disclaimer: post-mission oxygen calibration was not performed on the dissolved oxygen values in this version. This project has received funding from the European Union’s Horizon Europe ERC Synergy Grant programme under grant agreement No 101118693 – WHIRLS (DOI:10.3030/101118693). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or European Research Council Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.