Johnson's Mills, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Johnson's Mills is known for the Johnson's Mills Shorebird Reserve and Interpretive Centre, which attracts birdwatchers to observe the annual migration of thousands of shorebirds. The best time to visit Johnson's Mills, Canada, is during the summer months of July and August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!