Omega, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Omega, Illinois, United States, is not widely known for specific tourist attractions or proper nouns. The best time to travel to Omega, United States, is in late spring when the average air temperature is around 75°F and the water temperature is approximately 70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!