Grendave, Lithuania offers 1 beach perfect for sunbathing, surfing, swimming, and more. Vilnius, Lithuania, is known for its UNESCO-listed Old Town and the iconic Gediminas Tower. The best time to travel to Grendave, Lithuania, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!