Greece has a warm Mediterranean climate. In summer, dry hot days are often relieved by stiff evening breezes, especially in the north, on the islands and in coastal areas. Athens can be stiflingly hot, with temperatures occasionally exceeding 40°C (104°F) in July. Winters are mild in the south but much colder in the mountainous north, where it is not uncommon to see snow and temperatures plummeting to well below zero. November to March is the rainy season, most notably on the Ionian islands.

If you are planning a beach holiday, the sea is warm enough to swim from June through September, and hardier types will also manage in May and October. Seaside hotels are generally open from Easter through to late-October, as are water sports facilities.

Spring and autumn are the ideal seasons for hiking and mountain biking, when the days are sunny but not unreasonably hot. Spring sees the Greek countryside dappled with wild flowers, while in autumn the trees take on russet hues.

Although few people think of Greece as a winter destination, it is in fact possible to ski and snowboard here. Two of the most popular mountain ski resorts are Arahova (near Delphi) and Kalavrita (on the Peloponnese), both much loved by wealthy Athenians, and therefore also well provided with cosy hotels and authentic rustic eateries with blazing log fires.

Lightweight clothes (cotton is best) during summer months, including protection from the midday sun and sunglasses. Light sweaters are needed for evenings, especially on the islands. Waterproofs are advised for spring and autumn. Winter months can be quite cold, especially in the northern mainland, so normal winter wear will be required.