The best time to visit Newcastle, New Brunswick, is during the summer months, from June to August, when the weather is at its finest for outdoor activities and local events.During this period, the days are long and warm, with average temperatures around 20-25°C, making it ideal for exploring the Miramichi River and its surroundings. Many local festivals and events, such as Canada Day celebrations and the Miramichi Folksong Festival, take place in July and August, offering visitors a chance to experience the local culture.For those interested in fishing, particularly for Atlantic salmon, late spring (May to early June) and early autumn (September to October) also offer excellent conditions. The river is often less crowded during these shoulder seasons, and the scenery is beautiful with spring blossoms or autumn colours.