Blanchisseuse, Trinidad and Tobago offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Blanchisseuse, Tunapuna, Trinidad and Tobago, is known for the scenic Marianne River and the Blanchisseuse Beach. The best time to travel to Blanchisseuse, Trinidad and Tobago, is from January to May, with average air temperatures around 27°C (81°F) and water temperatures near 28°C (82°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!