The best time to go to Groton, New Hampshire, largely depends on your preferred activities, but generally, the late spring through early autumn months, from May to October, offer the most pleasant weather and a full range of outdoor opportunities.For those keen on hiking and enjoying the natural beauty, late spring (May to early June) provides lush landscapes and comfortable temperatures before the peak summer heat. This is also a good time for kayaking or canoeing on the local lakes and rivers.Summer, from July to August, is ideal for water-based activities like swimming in Newfound Lake, boating, and fishing. The warmer temperatures are great for enjoying the beaches and exploring the various walking trails. Families often find this period excellent for a holiday, with plenty of outdoor programmes and activities available.Autumn, particularly September and October, is spectacular for experiencing the famous New England fall foliage. The cooler, crisp air is great for scenic drives through the countryside and enjoying events like apple picking at local orchards.