North Union, Saint Vincent and the Grenadines offers 1 beach perfect for sunbathing, surfing, swimming, and more. Charlotte, Saint Vincent and the Grenadines is known for the stunning Tobago Cays Marine Park. The best time to travel to North Union, Saint Vincent and the Grenadines, is from December to April, 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!