Keflavík, Iceland offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Salobrena is known for its Moorish Castle, whitewashed houses, and stunning beaches. The best time to travel to Keflavik, Iceland, is from June to August, with average air temperatures around 50-55°F (10-13°C) and water temperatures around 45-50°F (7-10°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!