The Sea of Stars phenomenon on Vaadhoo Island in the Maldives occurs year-round, but it's not guaranteed to happen every night. The bioluminescent phytoplankton responsible for the glow are affected by several factors, including water temperature, wave patterns, and nutrient levels. As a result, the Sea of Stars may be more visible during certain times of the year or on nights with specific conditions. However, with the right conditions and a bit of luck, visitors can witness this breathtaking natural wonder on many nights throughout the year.