Praia Cruz, Sao Tome and Principe offers 1 beach perfect for sunbathing, surfing, swimming, and more. Praia Cruz, Agua Grande, Sao Tome and Principe, is known for its beautiful beaches and proximity to the capital city of Sao Tome. The best time to travel to Praia Cruz, Sao Tome and Principe, is from June to September, with average air temperatures around 25-27°C (77-81°F) and water temperatures about 26-28°C (79-82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!