Coastal warming was analyzed by means of satellite-derived sea surface temperature (SST) along the continental part of the Atlantic Arc extending from 37°N to 48°N for the period 1985–2005. Interannual SST variability calculated from anomalies shows an inhomogeneous warming trend in coastal SST (ΔSST). Coastal warming trend ranges from 3.5°C 100 a−1 at latitudes close to 48°N to 1.2°C 100 a−1 at latitudes close to 37°N. This warming is observed to reflect oceanic ΔSST which increases northward in the Atlantic area. In addition, a westward increase was also observed across the North Atlantic. Coastal warming is not constant all year long. It only occurs during spring and summer in the entire area under scope, following a trend similar to the annual one. The mean spring ΔSST values are 5.1°C 100 a−1 in the French coast, 4.4°C 100 a−1 in the Cantabrian coast, and 3.8°C 100 a−1 in the western Iberian Peninsula coast. Similar values (5.0°C 100 a−1, 3.7°C 100 a−1, and 2.7°C 100 a−1) are observed in summer.