The best time to visit Holderness, New Hampshire, is during the summer months, from June to August, or in early autumn, particularly September and early October.Summer offers ideal weather for enjoying Squam Lake and the surrounding outdoor activities. The days are long and warm, great for boating, swimming, and hiking. You'll find most local businesses, including restaurants and shops, fully open and operating. This period is particularly good for families looking for a classic lake holiday with plenty of activities for all ages.Early autumn is also a wonderful time, especially for couples or those seeking a more tranquil experience. The weather remains pleasant, and the crowds begin to thin after the summer rush.