Allaman, Switzerland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Allaman is known for the historic Allaman Castle and its scenic vineyards in the Vaud region of Switzerland. The best time to travel to Allaman, Switzerland, is from June to August, with average air temperatures around 70°F (21°C) and water temperatures in Lake Geneva around 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!