Saint Lawrence, Jersey offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Saint Lawrence, Western, Jersey is known for its beautiful beaches and the Jersey War Tunnels. The best time to travel to Saint Lawrence, Jersey, is from June to September, with average air temperatures around 18-22°C (64-72°F) and sea temperatures around 16-19°C (61-66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!