Weather in Санторини by month: what to expect

The weather in Санторини is shaped by its Mediterranean climate, offering mild winters and warm, dry summers. From November to March, the island sees cooler temperatures and occasional rain, while April marks the start of a long, sunny season that lasts until October. Travelers visiting Санторини in these months can expect plenty of sunshine and minimal rainfall, making it ideal for exploring the island’s landscapes and coastal areas.

The transition between seasons in Санторини is gradual, with May and October serving as comfortable shoulder months. During these periods, the crowds are smaller, and the weather remains pleasant, avoiding the peak heat of July and August. Even in winter, Санторини rarely gets cold enough to deter visitors, though the pace of life slows, and some seasonal businesses may close.

For those who prefer warmth without extreme heat, Санторини in June or September offers the best balance. The sea is warm enough for swimming, and the island’s famous sunsets are just as stunning, with fewer tourists than in the height of summer.

Temperatures in Санторини vary significantly between seasons, though extremes are rare. In January, the coolest month, daytime highs average +16.4 °C, while nights drop to +13.2 °C. By April, the weather warms up, with highs reaching +19.7 °C and lows around +15.1 °C, making it a pleasant time for outdoor activities.

Summer in Санторини is hot and dry, with July and August being the warmest months. Daytime temperatures often climb to +30 °C or higher, while nights remain warm at +25 °C. The heat is tempered by the island’s breezes, but the sun is strong, so shade and hydration are essential. By September, temperatures begin to ease, with highs around +27.5 °C and lows near +23.3 °C, offering a more comfortable climate for sightseeing.

Autumn in Санторини brings a gradual cooling, with October still warm at +23.7 °C during the day and +19.8 °C at night. By December, temperatures drop to +17.4 °C in the afternoon and +14.1 °C after dark. While winters are mild compared to much of Europe, the sea temperature also cools, reaching +17.8 °C in January before warming again in spring.

Rainfall in Санторини is concentrated in the cooler months, with December being the wettest, averaging 60 mm of precipitation. January and February also see moderate rain, with 34 mm and 38 mm respectively, though storms are usually short-lived. The rest of the year is much drier, particularly from June to August, when rain is almost nonexistent, with July often recording no rainfall at all.

The dry season in Санторини begins in April and lasts through October, with only occasional showers. Even in May and November, rainfall remains light, averaging 24 mm and 21 mm respectively. This pattern makes Санторини a reliable destination for those seeking sunshine, especially in summer, when the island’s landscapes take on a golden hue under the clear skies.

Humidity in Санторини is generally comfortable, though it rises slightly in winter. The lowest humidity levels occur in July, at around 60%, while December sees the highest at 70%. Despite the occasional rain, the island’s winds help keep the air fresh, and even in the wetter months, sunny spells are common.

When visiting Санторини in summer, lightweight clothing is essential, along with sun protection like hats, sunglasses, and high-SPF sunscreen. The strong sun and heat in July and August mean breathable fabrics and comfortable footwear are a must, especially for walking on the island’s volcanic paths. A light jacket or shawl can be useful for cooler evenings, even in peak season.

For trips to Санторини in spring or autumn, layers are key. In April or October, daytime temperatures can reach +20 °C or more, but evenings may cool to +15 °C or below. A mix of short-sleeved shirts, light sweaters, and a versatile jacket will cover most weather scenarios. Waterproof shoes or a compact umbrella are worth packing for the occasional shower in November or March.

Winter travelers to Санторини should prepare for mild but unpredictable weather. While heavy winter gear isn’t necessary, a warm coat, scarf, and closed-toe shoes will help during cooler days and evenings. Since some outdoor attractions may be less accessible in rain, a waterproof layer is also a good idea. For those planning to swim, the sea remains relatively warm in November and December, but the cooler air may limit beach time.