The best time to visit Alonissos is between May and September

This period boasts comfortable temperatures, minimal rainfall, and ideal weather conditions for outdoor exploration. A secondary good season to consider is late spring, specifically April, when the island begins to warm after winter, though rainfall can still be a factor.

Spring: April to June

Spring in Alonissos is marked by gradually warming temperatures and decreasing rainfall, offering a refreshing atmosphere for visitors. These months are perfect for hiking and exploring the island’s lush landscapes as nature burst back into life.

• April: Temperatures start to rise, averaging between 12°C and 19°C, with rainfall beginning to decrease. Ideal for walking and experiencing the island’s early bloom.
• May: As temperatures reach between 16°C and 24°C and rainfall further lessens, May is a wonderful month for outdoor adventures and exploring the countryside on foot.
• June: The weather is typically warm and dry, ranging from 20°C to 28°C, making it perfect for diving and snorkelling in crystal-clear waters.

Summer: July to September

The summer months bring warm, dry weather ideal for every kind of outdoor activity Alonissos has to offer. This peak season is characterised by its lengthy, sun-drenched days.

• July: Offers consistently warm weather, ranging between 23°C and 31°C. Perfect for sunbathing and enjoying the pristine beaches.
• August: The hottest month, with temperatures hovering around 24°C to 32°C. Ideal for water sports enthusiasts as the sea temperatures reach their peak.
• September: The weather remains warm (21°C to 29°C), with the added benefit of slightly cooler sea breezes, making it suitable for coastal walks and exploring Alonissos’s marine parks.

Autumn: October

The early autumn in Alonissos sees mild temperatures and a rise in rainfall. While the island begins to quieten down, October can still be an inviting time for those interested in experiencing the natural beauty of Alonissos.

• October: Daytime temperatures range from 17°C to 24°C. As rainfall becomes more frequent, it offers a picturesque setting for witnessing the island’s transition into the cooler months while exploring the landscape.