Diego Martin, Trinidad and Tobago offers 1 beach perfect for sunbathing, surfing, swimming, and more. Diego Martin is known for the Chaguaramas National Park and the Diego Martin Water Wheel in Trinidad and Tobago. The best time to travel to Diego Martin, Trinidad and Tobago, is from January to May, with average air temperatures around 85°F (29°C) and water temperatures near 82°F (28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!