Momboca, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Momboca, Rio de Janeiro, Brazil, is not widely recognized for specific tourist attractions or proper nouns. The best time to travel to Momboca, Brazil, is from June to August, when the average air temperature is around 25°C (77°F) and water temperature is approximately 26°C (79°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!