Abstract Deep‐water masses are formed in the North‐Atlantic, making studies of δ13C of dissolved CO2 in this region key to monitor and understand the spreading of anthropogenic carbon into the ocean interior. The objective of this study is to quantify the Suess effect (SE) in North Atlantic water masses using sulfur hexafluoride (SF6) as the anthropogenic marker. We investigated water samples on two sections across the North‐Atlantic Ocean (∼48°N) from 2017/2018. Our data show that only bottom‐waters on the eastern side of the Mid‐Atlantic Ridge do not yet have a significant SE signal using SF6. On the western side, a massive eddy visible in 2018 advected Labrador Sea Water labeled with a strong SE down to 2,000 m. These findings contribute to our understanding of the anthropogenic carbon signal in the deep ocean and highlight the importance to consider the SE in core top calibrations and paleoceanographic reconstructions using foraminiferal δ13C.