Rising permafrost and seawater temperatures, along with longer open-water seasons, are increasing Arctic coastal erosion, releasing permafrost carbon into the nearshore zone. There, the carbon can be either buried in marine sediments, transported offshore, or degraded and released into the atmosphere as greenhouse gases (GHGs). The transport pathways of organic carbon (OC) in the nearshore zone remain poorly understood, as do the dynamics of OC and the external factors influencing them. The aim of our study was to address this knowledge gap by repeatedly sampling the nearshore zone of Herschel Island-Qikiqtaruk (HIQ), Canada, for dissolved and particulate OC (DOC, POC). In July 2022 we sampled two transects in front of different geomorphological settings (retrogressive thaw slump and low permafrost cliff coast) for two consecutive weeks. Per transect six stations in different distances offshore were sampled numerous times in the water column. In order to gain insight into the hydrological setting of the nearshore zone, turbidity measurements were conducted together with CTD (depth, salinity, temperature) measurements. Marine grab and core samples were taken to also include the sedimentary environment below the water column in the nearshore zone. In the data we see a distinct vertical gradient in temperature, turbidity, and organic carbon concentration in the water column for both transects. This gradient is influenced by the Mackenzie River plume and the discharge of the slump, yet exhibits additional temporal variability. We linked this temporal variability in OC to environmental factors, with a particular focus on wind (ERA5).