The best time to go to Tulameen is during the summer months, from late June to early September, when the weather is ideal for outdoor activities.During this period, you can expect warm, sunny days, superb for enjoying Otter Lake and the surrounding wilderness. The average daily temperatures are comfortably warm, making it pleasant for swimming, boating, fishing, and hiking. The longer daylight hours also allow for extended enjoyment of the area's natural beauty.Families often find July and August particularly appealing. The lake is at its warmest for swimming, and activities like paddleboarding and kayaking are popular. Many local events and community gatherings also take place during these peak summer weeks, offering a chance to experience the local culture.For those who enjoy fishing or a quieter visit, late June and early September offer pleasant weather with fewer crowds.