Korissia, Greece offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Korissia is known for its picturesque harbor and proximity to the ancient Temple of Apollo. The best time to travel to Korissia, Greece, is from May to September, with average air temperatures around 75°F (24°C) and water temperatures around 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!