Santarem, Brazil offers 1 beach perfect for sunbathing, surfing, swimming, and more. Santarem is known for its meeting of the waters at the confluence of the Amazon and Tapajos rivers, as well as the nearby Alter do Chao beach. The best time to travel to Santarem, Brazil, is from June to November, when the average air temperature is around 28°C (82°F) and the water temperature is approximately 27°C (81°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!