Both the mainland, and the islands of Greece are kept moist by the Aegean and Ionian Sea along the coastline, which exceeds a total of 13,500 km. This huge body of water provides a favorable impact on all coastal vineyards, and has been instrumental, over several centuries, in these areas being selecting for viticulture.
The sea, due to the nature of water, has the ability to store heat, so moderating the fluctuations of the daily temperature. Thus, we see the creation of a favorable microclimate on the coastal vineyards when compared with the mainland ones at the same latitude and altitude. Additionally, cool and humid winds coming from the sea, offer more protection during the hot hours of the day, reducing the temperature of the vineyard thus helping the normal ripening of the grapes. This positive effect can be seen even tens of kilometers inland from the coast, when not obstructed by mountains.
Lakes and rivers have a similar effect on the surrounding vineyards, to a lesser extent of course, due to their more limited water mass. For example, Amindeo vineyards are surrounded by four lakes, the largest being Vegoritida, and the vineyards in Mesenikola, located near an artificial Lake, Plastira.