Greece Climate & Weather Averages

Weather Information for Greece

Few destinations match Greece for sheer variety of sailing conditions; a sprawling archipelago of over 200 inhabited islands, spanning three distinct sea areas, each with its own climatic character. For those planning yacht charters in Greece, understanding that variety is as important as checking the forecast. The Aegean runs hot and wind-driven in summer; the Ionian is greener, calmer, and more sheltered; the Dodecanese holds its warmth deep into autumn. What unites them is a generous sailing season, exceptional light, and the kind of reliable summer weather that has drawn seafarers to these waters for centuries.

Summers across Greece are consistently hot and dry, with daytime temperatures ranging from 28°C to 35°C from June through September. The Cyclades and eastern Aegean run hotter and drier than the Ionian, where slightly higher humidity and occasional brief showers are more common even in peak summer.

The meltemi is the defining weather phenomenon of the Greek sailing season, a strong, dry northerly wind that builds across the Aegean from mid-June, reaching peak intensity through July and August at Force 4–6. It typically rises during the day and eases overnight, making morning departures preferable for passages against the wind. The Ionian islands sit largely outside its reach, experiencing the gentler maestro wind instead, making this a more consistently comfortable cruising ground for families and less experienced crews.

Autumn brings some of the best sailing conditions of the year, the meltemi subsides, temperatures settle into the 20–26°C range, and anchorages that are packed in August become quiet and accessible. Winter, from December through February, is cooler at 10-15°C with more frequent rainfall, and sailing activity drops sharply across the country.

Greece Climate Charts