This data release child item contains fiber-optic distributed temperature sensor (FO-DTS) data collected along the western unwalled shoreline of the Bremerton Naval Complex, Bremerton, Washington, USA from July 30, 2020, to August 11, 2020. Continuous profiles of water temperature were collected along a spatially georeferenced fiber optic cable deployed in an out-and-back U-shape with approximately 2- meter distance between the parallel cable lengths by a Sensornet® Oryx DTS FO-DTS (Fiber-optic distributed temperature sensor). Data were collected in a single ended configuration with two channels, Channel_1 and Channel_2, where water temperature was spatially averaged over 1.01- meter linear intervals by the Oryx instrument and collected at 15-minute intervals. Only the Channel_1 data were used for hydrologic interpretation and are contained in this release. Independent water-temperature data was collected at four locations by Hobo® Water Temp Pro v2 data-logging thermistors. Water-temperature data from thermistors were used as an independent water-temperature data calibration-check that was collected by data-logging thermistors verified by a National Institute of Standards and Technology (NIST)-certified thermistor with an accuracy of ±0.1 °C. A subset consisting of Channel_1 data from July 30, 2020 to August 7, 2020 was used for data visualization. This data was used to identify cold-water locations where groundwater, potentially containing elevated levels of metals and other toxic contaminants, may be discharging to Sinclair Inlet. The three zip folders contain: 1. "RAW_Data", which are the Oryx machine data text files (.ddf) from the fiber-optic temperature sensing tool measured with a time-series. These files include all data collected on Channel_1 by the fiber-optic distributed temperature sensor during its deployment along the longitudinal profile and internal instrument noise. 2. "Independant_Temperature_Data", which contains data collected independently by temperature data loggers during deployment. 3. "Visualization_Data", which contains geospatial data of points along the fiber-optic cable and USGS-DTSGUI (Domanski, et al., 2019) output files of FO-DTS temperature profiles by time and location.