The best time to visit Koh Tang is during the dry season, which runs from November to May, as this offers the most favourable conditions for enjoying the island's natural beauty and activities.During these months, you can expect plenty of sunshine and minimal rainfall, making it ideal for diving, snorkelling, and relaxing on the beaches. The sea is typically calm and clear, providing excellent visibility for underwater exploration. The average temperature during this period is a pleasant 28°C to 32°C.The shoulder months of November and May can be particularly appealing. You'll often find excellent weather with fewer visitors compared to the peak months of December to February, which can be busier. This allows for a more tranquil experience both on the island and during boat transfers.While Koh Tang is accessible year-round, the rainy season, from June to October, can bring heavier downpours and choppier seas, which might impact boat schedules and water-based activities.