Kamakura is beautiful year-round but the timing matters. Spring brings cherry blossoms in late March and April, drawing enormous crowds from Tokyo. The hydrangea season in June is one of Kamakura's most distinctive events — Meigetsu-in is famous for its ajisai (hydrangeas), and the rainy season's grey light suits the temple gardens perfectly. Autumn foliage in November is spectacular around the great Zen temples.
Summer (July–August) is hot and humid, and the beaches at Yuigahama and Zaimokuza fill with Tokyo surfers and families. Winter is quiet, crisp, and often clear — Mount Fuji is visible from higher points in the city on cloudless winter mornings.
Weekday visits are significantly more pleasant than weekends, when the narrow streets and popular sites become genuinely crowded. Public holidays and the cherry blossom period are peak-of-peak times to avoid.