The customary gratuity for a snorkel tour typically ranges around $10 per person or 15-20% of the total cost of the snorkeling excursion. Snorkel tour guides merit a gratuity when they elevate the tour into an exciting and enjoyable experience. You can guage how much to tip your snorkel tour guide by whether they go the extra mile and create an atmosphere of warmth and hospitality – but also ensure that their guests have a safe and pleasurable journey. Tipping is entirely optional, and individuals have the freedom to refrain from tipping, particularly if they are dissatisfied with the service provided.