The dataset consists of measurements taken from the surface waters (< 3m) in the North Sea in July 2023. The measurements include sea surface temperature (°C), sea surface salinity, chlorophyll a concentrations (µg per L) and transmission (%)  from calibrated sensors. Discrete water samples were collected using a trace metal clean towed FISH. Filtered seawater samples were analysed for inorganic nutrients including nitrate+nitrite, phosphate and silicate (µM), dissolved iron (nM) and dissolved manganese (nM). Samples were filtered for the analysis of particulate carbon concentrations (µM).