Borgerende Rethwisch, Germany offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Borgerende Rethwisch is known for its proximity to the Baltic Sea and the Nienhagen Ghost Forest. The best time to travel to Borgerende-Rethwisch, Germany, is from 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!