AVHR images recorded during 2001-2004 were used to analyse Sea Surface Temperature (SST) spatial variability in the Subtropical North-East Atlantic. The individual images were decimated into 4.4 km and merged into 15-day averages. To reduce remnant non-physical noise, several filters were developed. Diurnal thermocline formation stipulated that during year round day-time SST images are warmer than night-times ones. SST stationary anomalies were obtained using a method of least-square fit of the all-region-average seasonal curve to the temperature variability at each pixel. The anomaly field reflects that the Mid-Atlantic Ridge (MAR) forms an efficient barrier for heat exchange between the western and eastern Atlantic basins. The MAR was characterised by colder SST values, possibly related to flow interaction with bottom topography. On the winter-time SST stationary anomaly field the Azores current could be distinguished.