Saint Martins, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Martins, New Brunswick, Canada, is known for the Fundy Trail Parkway and the Sea Caves. The best time to travel to Saint Martins, Canada, is from June to September, with average air temperatures ranging from 15°C to 25°C and water temperatures around 12°C to 18°C. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!