The best time to visit Ottenstein, Lower Austria, is during the late spring (May to June) and early autumn (September to October) when the weather is pleasant and the natural beauty of the Waldviertel region is at its peak.During late spring, the landscape around Ottenstein Reservoir is lush and green, and the temperatures are mild, making it ideal for outdoor activities like hiking, cycling, and exploring the surrounding forests and castle ruins. You'll find fewer crowds compared to the peak summer months, allowing for a more tranquil experience.Early autumn offers similarly comfortable weather, often with clearer skies and the added bonus of vibrant autumnal colours in the forests. This period is also excellent for enjoying local produce and wines, as harvest festivals might be taking place in the wider region. It's a superb time for couples seeking scenic drives and peaceful walks.While summer (July and August) is also popular, it can be busier with more tourists, especially at the lake.