Groningen, Netherlands offers 1 beach perfect for sunbathing, surfing, swimming, and more. Groningen is known for the Martinitoren, the Groninger Museum, and the University of Groningen. The best time to travel to Groningen, Netherlands, is from June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 17°C (63°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!