Overall, Attiki has a typical warm Mediterranean climate. In fact, this is one of the hottest and driest regions in Greece. The entire prefecture, with the exception of its west-northwest part, is surrounded by the sea. Cool breezes (Meltemia) blow inland from the sea and mitigate the summer temperatures. Depending on the proximity to the sea and the vineyard altitude, the varied landscapes provide a number of mini terroirs with different microclimates, ideal for viticulture. Thus, there are significant variations in climate within the sub-regions.
The coastal zone of Mesogaia is located in the eastern part of Attiki and has the warmest and driest climate in the entire prefecture. On the other hand, the region of Megara due to its proximity to the Saronic and Corinth gulfs on both sides, is relatively cooler. Further to the northwest, the PGI Slopes of Kithaironas display a more continental influence in its microclimate. However, the northern part of Attiki is the one with the coolest climate. Vineyards are found in the mountains of Parnitha and Penteli and the wine-styles are more distinctive than in other warmer regions of Attiki.