The optimal time to visit Merk Bay Beach in North Passage Island, close to Long Island, Andaman, is during the dry season which typically runs from October to May. This period offers pleasant weather with minimal rainfall, allowing for smooth ferry operations and water activities. The temperatures during these months range comfortably between 20°C to 30°C, creating ideal conditions for sunbathing, swimming, and indulging in various beach sports. Moreover, the clear blue skies and calm seas during these months make it perfect for snorkeling and scuba diving, providing excellent underwater visibility to explore the vibrant marine life.
Travelers should consider avoiding the monsoon months from June to September, as the islands experience heavy rainfall, which can hinder outdoor activities and transportation to the beach. The rough seas make it unsafe for water sports, and the beach's beauty can be overshadowed by the inclement weather conditions. If a visit during the monsoon season is inevitable, it's crucial to check the local weather forecasts and sea conditions prior and have flexible travel plans to adjust for any unexpected changes.