MarchCool, and the islands reopenFerries increase as the season starts. Ritsurin’s plums finish and the cherries begin.
AprilCherry blossom at the castle and the gardenRitsurin and Tamamo Park both flower. The best-looking month of the year.
MayThe best walking monthDry, mild and long-lit. Island ferries are pleasant rather than hot.
JuneRainy season, brieflyThe Inland Sea side is drier than the Pacific side. Arcades and udon are unaffected.
JulyHot, and the sea is calmIsland hopping is at its easiest. Start early and eat udon at midday.
AugustPeak heat and peak visitorsThe islands are busy. Ritsurin opens before six — use that.
SeptemberTyphoon watch, then clarityFerries can cancel. Late September is excellent.
OctoberThe other best monthClear, mild, and the Setouchi Triennale runs in its autumn session in festival years.
NovemberAutumn colour at RitsurinLate November, with evening illumination. The garden at its finest.
Dec–FebCool and very quietFew ships. Udon is a winter food and the arcades are covered.