São Miguel in July

May through October offers the most reliable weather, but São Miguel's climate stays mild year-round. July and August bring the most tourists and highest prices – book accommodations well ahead. September hits the sweet spot with warm weather, calmer seas, and fewer crowds. Winter means more rain and rougher Atlantic conditions, but temperatures rarely drop below 15°C. Hot springs feel even better when it's drizzly outside. Just pack layers – weather changes quickly in the mountains. Avoid major Portuguese holidays like Easter week when mainland tourists flood in. Festa do Senhor Santo Cristo in May brings religious processions and packed hotels. The Azores Trail Run in October attracts serious hikers but doesn't overwhelm the island like summer crowds do.