Behia, Greece offers 1 beach perfect for sunbathing, surfing, swimming, and more. Behia, Ionian Islands, Greece, is known for its stunning beaches and the historic Venetian Castle of Behia. The best time to travel to Behia, Greece, is from late May to early October, with average air temperatures around 75°F (24°C) and water temperatures near 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!