Saint Martin, Jersey offers 22 beaches perfect for sunbathing, surfing, swimming, and more. Saint Martin, Eastern, Jersey is known for the Jersey Zoo, founded by naturalist Gerald Durrell. The best time to travel to Saint Martin, Jersey, is from June to September, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 17-20°C (63-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!