High Season: March to May; October to November
Sailing during this season: The weather in East Asia is most pleasant in the spring and autumn months. Specifically, cruising Japan in late March offers a chance to experience the famed cherry blossoms in bloom, while October to November brings beautiful autumn foliage. Keep in mind that late April to early May is Golden Week in Japan, which is the busiest and most expensive time of year.
Low/Shoulder Season: June to September; December to February
Sailing during this season: While there are fewer crowds during these times in East Asia, the weather can be extreme. June to September is often very hot and humid, while temperatures from December to February are bitterly cold, regularly dropping below freezing.