The most popular time to visit Koshu is during the autumn months, particularly September and October, when the area is renowned for its stunning fall foliage and grape harvest festivals. During this period, temperatures are pleasantly mild, typically ranging from the mid-60s to low 70s Fahrenheit, making it ideal for leisurely outdoor activities like vineyard tours and scenic walks through the picturesque countryside.
As you plan your trip, keep in mind that the peak tourist season generally stretches from August to October. This is when Koshu comes alive with vibrant colors and cultural events, offering a wonderful opportunity to experience local traditions and culinary delights. The grape harvest is an especially exciting time, with many wineries hosting tastings and tours, allowing you to immerse yourself in the region's rich wine culture.
For those who appreciate a quieter experience, visiting in late September or early October can provide a superb balance. While the weather remains delightful for outdoor activities, the crowds begin to thin out, allowing for a more intimate experience at the wineries and local attractions. You can enjoy the breathtaking views of vineyards blanketed in autumn hues, while also savoring the fine wines produced in this celebrated region.
If you're looking for a budget-friendly option, March can be a great time to visit Koshu, as prices tend to be lower. Although the weather is cooler, this is a time when you can experience the tranquility of the area without the hustle and bustle of peak tourist season.