The best times to visit Bethlehem, New Hampshire, are during the summer months from June to August and the autumn foliage season in September and October.Summer offers ideal weather for enjoying the White Mountains. You'll find comfortable temperatures superb for hiking, exploring scenic drives, and visiting local attractions like the Rocks Estate. This season is particularly good for families, with many outdoor activities available, from swimming in local lakes to miniature golf and nature walks. The longer daylight hours also allow for more extensive exploration.For those who appreciate stunning natural beauty, the autumn foliage season in September and October is unparalleled. The hillsides erupt in a spectacular display of reds, oranges, and yellows. This period is superb for couples seeking a scenic and romantic getaway, with opportunities for picturesque drives along routes like the Kancamagus Highway, leisurely strolls, and enjoying the cosy atmosphere of local inns. While the weather is cooler, it's generally sunny and crisp.