Green Oak, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Green Oak, Michigan, United States, is known for the Green Oak Village Place shopping center. The best time to travel to Green Oak, United States, is in late spring (May to June) when the average air temperature is around 65-75°F and water temperature is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!