Ostend, Belgium offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Ostend is known for the Atlantic Wall Open Air Museum and the James Ensor House. The best time to travel to Ostend, Belgium, is from June to August, when the average air temperature is around 18-20°C (64-68°F) and the water temperature is approximately 17-19°C (63-66°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!