The best time to go to Port Arthur is during the warmer months, from December to February, which is summer in Tasmania, or during the shoulder seasons of March to May (autumn) and September to November (spring).During the summer, the weather is generally mild and pleasant, with average temperatures ranging from 17°C to 23°C (63°F to 73°F). This is ideal for exploring the extensive Port Arthur Historic Site on foot, taking boat tours around the Tasman Peninsula, and enjoying the outdoor activities available. Be aware that this is also the peak tourist season, so booking accommodations and tours in advance is advisable.Autumn offers similarly agreeable weather, with slightly cooler temperatures averaging 12°C to 18°C (54°F to 64°F) and beautiful fall foliage, particularly in the surrounding national parks. The crowds are typically smaller than in summer, making for a more relaxed visit while still enjoying comfortable conditions for outdoor exploration.Spring brings blooming wildflowers and an increase in wildlife activity, with average temperatures from 11°C to 17°C (52°F to 63°F). Like autumn, it's a great time to visit for those who prefer fewer crowds and pleasant weather for sightseeing and scenic drives.While winter (June to August) is generally colder and wetter, with temperatures around 8°C to 13°C (46°F to 55°F), it presents a different kind of beauty with dramatic skies and fewer visitors.