The mild climate of northern Europe and Scandinavia relative to other regions at similar latitudes is partly attributed to the northward transport of warm ocean water from the Gulf Stream and North Atlantic Current and resulting ocean-atmospheric heat exchange. The past behavior of this marine variability at high-frequency timescales (i.e., annual), however, is often inferred through terrestrial proxy records, most notably, tree rings. Recent development of annually resolved proxy records from bivalve shells provides a marine counterpart to tree-ring records, and an opportunity to assess the coupling between marine and terrestrial climate in coastal regions. This study presents a newly produced, annually resolved, multicentury sea-surface temperature reconstruction using d18Oshell of the marine bivalve, Arctica islandica, from coastal northern Norway. The record is positively correlated with a Fennoscandian summer temperature reconstruction using a composite of tree ring records (1539-2005; Pearson rannual = 0.33; p < 0.001). A combined record of d18Oshell and shell growth also captures the decadal-scale variability at lower latitudes as characterized by the Atlantic Multidecadal Variability index (1880-2012; rannual = -0.44; rsmoothed_7yr = 0.71; p < 0.001; increasing correlations up to a six-year lag). These results enable insight into Arctic-Atlantic marine and terrestrial coupling through time and highlight the potential to strengthen regional marine climate syntheses using shell-based records.