Saint Clair Shores, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Saint Clair Shores is known for the Nautical Mile, a stretch along Jefferson Avenue featuring marinas, restaurants, and shops. The best time to travel to Saint Clair Shores, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature in Lake St. Clair is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!