The best time to visit Oberaach for pleasant weather and outdoor activities is generally during the late spring, summer, and early autumn months, specifically from May to September.
During these months, the weather is typically mild to warm, with longer daylight hours, making it ideal for exploring the natural beauty of the Canton of Thurgau. You'll find it comfortable for cycling along Lake Constance, hiking in the surrounding hills, or enjoying a boat trip on the lake.
For travellers interested in water sports or swimming in Lake Constance, July and August offer the warmest water temperatures. This period is also when many local events and festivals take place, providing a chance to experience the regional culture.
If you prefer slightly cooler temperatures and fewer crowds, May, early June, and September are excellent choices.