Premium Snorkel Tour to the Bays of Koh Tao onboard the Oxygen

This 6-hour snorkel tour circles several bays around Koh Tao aboard the Oxygen boat, with five or more stops depending on conditions — from $47 per person, rated 4.9 from 129 reviews.

After hotel pickup and a Mae Haad Pier check-in, the Oxygen calls at Freedom Bay, Buddha Rock, Shark Bay, Ao Luek and Tao Thong Bay. The route covers Ao Luek — a concave bay good for snorkeling even at low tide, with coral on both sides — and Shark Bay, a quiet white-sand cove named for the blacktip reef sharks that pass through, reached via Buddha Rock, a boulder formation locals treat as a spirit rock. A stop for vegan or chicken sandwiches and panna cotta happens on board partway through, with a final snorkel at Tao Thong Bay to look for staghorn coral before the return to Mae Haad Pier.

Snorkeling gear, life jackets, drinking water, coffee, tea and fresh fruit are included, along with a toilet on board and basic accident insurance — useful on a 6-hour trip with this many water stops. Groups run up to 15 people. Koh Nangyuan’s entrance fee isn’t included and is paid separately; hotel transfer covers most of Koh Tao except Mango Bay and Lighthouse Beach, where you’d need to make your own way to the pier.

Insider Tip: You’re back at Mae Haad Pier by midday, which leaves the afternoon free to catch a ferry onward to Koh Samui or Chumphon the same day if your schedule needs it.

This suits confident swimmers who want several distinct snorkel spots rather than one long stop; it’s rated a moderate-difficulty tour, so anyone who needs calm, shallow water throughout might prefer a single-bay snorkel trip instead.