Monroe, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Monroe, Connecticut, United States, is not particularly known for travel and beach tourism. The best time to travel to Monroe, United States, is in the spring (April to June) when the average air temperature is around 70-80°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!