The best time to visit Alpena is during the summer months, from June to August, when the weather is warm and ideal for outdoor activities.During this period, temperatures are pleasant, typically ranging from the mid-60s to low 80s Fahrenheit, making it superb for exploring the Thunder Bay National Marine Sanctuary. You can enjoy glass-bottom boat tours, kayaking, or diving to see shipwrecks. The city's downtown area, particularly along 2nd Avenue, is bustling with shops and eateries, and the Alpena Wildlife Sanctuary offers pleasant walking trails. This season is particularly appealing for families looking for a relaxed vacation with plenty of opportunities for outdoor adventure and discovery.For those interested in fishing or a quieter experience, the shoulder seasons of late spring (May) and early fall (September) also offer good weather and fewer crowds. You'll still find many attractions open, and the changing foliage in the fall provides a picturesque backdrop for outdoor activities.