Helweh, Lebanon offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Helweh, Mount Lebanon, Lebanon, is known for its proximity to the Jeita Grotto, a stunning natural limestone cave system. The best time to travel to Helweh, Lebanon, is in late spring (May), when the average air temperature is around 25°C (77°F) and the Mediterranean Sea temperature is approximately 21°C (70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!