Buck Island Reef Turtle Cove Is the Boat Trip Worth It

We anchored thirty yards off the rocky shoreline just as a squall drifted west toward Vieques. The water shifted into that bright, glowing turquoise you only ever see when the sun cuts across a clean white sand bottom. If you have spent any time browsing excursion desks in Charlotte Amalie or flipping through tour flyers at Red Hook, you have seen the glossy photos of Turtle Cove. Most people booking a trip to buck island st thomas want one specific experience. They want to slip over the side of a boat with a mask on and float five feet above a green sea turtle peacefully grazing on sea grass.

Paying anywhere from $85 to $145 per person for a three-hour boat excursion is a real expense, especially for families. You might wonder if you should just rent a car, drive to a public beach, and swim out from shore for free. The short answer is that the boat trip is worth every dollar, provided you know what kind of boat to book and what the cove actually looks like underwater. Buck Island is an uninhabited wildlife sanctuary sitting two miles south of St. Thomas, and its western pocket holds one of the most reliable gatherings of sea turtles in the northern Caribbean.

St Thomas Buck Island vs St Croix: Avoiding the Common Mix-Up

Travelers mix up these two islands constantly. Honestly, internet search results make the confusion much worse. There is Buck Island Reef National Monument off the northeast shore of St. Croix, which is famous for an underwater snorkel trail through towering elkhorn coral barriers. That island is forty miles south across open Caribbean seas. You cannot take a morning catamaran ride from St. Thomas to St. Croix for a casual snorkel.

The spot we are talking about is the Buck Island National Wildlife Refuge, often called Little Buck Island or simply St Thomas Buck Island. It spans roughly 45 acres of scrubby hills, prickly pear cactus, and steep volcanic rock. The federal government took over management back in 1969 to safeguard nesting terns, gulls, and migratory songbirds. The marine boundary protects the reefs and sea grass beds that wrap around its leeward side.

You cannot step foot on the land here. There is no beach bar. No boardwalks exist. Everything you do happens directly from the swim step of your boat.

That distinction matters because the scenery underwater is completely different. St. Croix gives you dramatic coral walls. Little Buck Island gives you shallow sandy flats, waving sea grass, and wild sea turtles that treat snorkelers like floating driftwood.

What Turtle Cove Snorkeling St Thomas Is Actually Like

The boat ride out takes about 25 to 35 minutes from the cruise docks at Yacht Haven Grande or Crown Bay. You motor through the harbor mouth, clear the point by Hassel Island, and then feel the boat lift on the southern ocean swells. Once the captain rounds the northwest tip of Little Buck Island, the water goes flat. The island's rocky ridgeline cuts the easterly trade winds, creating a calm, sunlit swimming basin known as Turtle Cove.

The bottom here sits between 16 and 24 feet down. It is surprisingly deep if you are used to wading into the water from a sloping shoreline. You drop into the water, clear your snorkel, and look down through visibility that easily pushes 60 feet on a sunny morning. Below you lies a pale carpet of sand dotted with patches of bright green syringodium and turtle grass.

That grass explains why the animals stay here year-round. Green sea turtles graze on the tender shoots all day long. They spend several minutes chewing along the bottom, surface for a quick breath of air, and drift back down like heavy river stones. They have heard outboard motors and seen tourists in bright yellow flotation belts every single day for thirty years. They simply do not care about you. If you want to know where to swim with sea turtles in St Thomas with an absolute guarantee of seeing them, this cove is hard to beat.

On my last trip out, our group spotted five separate green turtles within fifteen minutes of dropping into the water. A southern stingray about four feet across was gliding nearby, stirring up small plumes of silt with its wings as it hunted for tiny mollusks. Sometimes a spotted eagle ray passes through the deeper blue water near the outer mooring buoys. The marine life here feels wild yet weirdly comfortable around swimmers.

Comparing Boat Tours to Buck Island St Thomas Snorkeling

Because there is no road or foot ferry to Little Buck Island turtle cove, your choice of boat defines the whole morning. Dozens of operators run this route twice daily, but their styles vary wildly. Some vessels carry sixty passengers with music thumping through waterproof speakers, while others host six people on an intimate wooden sailing ketch.

If you prefer peace, smaller is always better. The big catamarans are convenient and cost less, but jumping into the water with fifty other people can feel like snorkeling in a busy municipal swimming pool. The turtles stay calm, but you end up dodging other people's flippers. If you are trying to weigh the trade-offs between group sails and smaller vessels, reading up on private boat charters vs group snorkel tours can help you choose the right pace for your family.

Before putting down a deposit on any vessel, consider the small operational details that separate a great day from a mediocre one:

• Departure dock location: boats leaving from Charlotte Amalie save you an expensive 35-minute taxi ride across island traffic from the East End.
• Gear provided: ask whether the boat carries soft silicone masks or stiff, cheap plastic ones that leak water around your nose.
• Swim platforms: check if the boat has a sturdy, submerged ladder, which makes climbing back aboard painless for older knees.
• Bar policies: reputable captains keep the rum punch locked away until every guest has finished their swim and dried off.

The Hidden Bonus: Shipwreck Cove and Cartanza

Most boat captains do not stop solely at Turtle Cove. After forty minutes of watching turtles graze in the sea grass, the crew will typically motor around the southern ledge of the island to a nearby indentation called Shipwreck Cove. This is where the Cartanza Señora rests.

The Cartanza is a 190-foot steel-hulled cargo freighter with a strange past. It carried military goods during the second World War, later hauled produce across the islands, and was reportedly abandoned after being caught with illegal cargo in Charlotte Amalie harbor during the 1970s. Local dive operators and environmental authorities towed the derelict ship out to Buck Island in 1979 and sank it to establish an artificial reef.

Hurricane Hugo came through in 1989 and broke the freighter into three massive pieces. Today, the wreck sits in roughly 35 to 40 feet of water on a pale sand floor. The wheelhouse and broken cargo holds create huge, moody shadows below. Schools of yellowtail snapper cluster near the remaining deck plates, while juvenile sergeant majors dart through the twisted piping. Large barracudas often hang motionless twenty feet down, looking like polished silver spears.

Snorkeling above a real shipwreck in warm Caribbean water adds an entirely different thrill to the day. You drift over deep water, peering into the cavernous holds, and then look over your shoulder to see a pair of blue tangs grazing on algae covering the rusted hull plates.

Practical Logistics and What to Bring

Because the boats drop anchor in open water, you should be honest with yourself about your swimming comfort. The cove is sheltered from heavy groundswells, but you are still in deep ocean water. There is nowhere to put your feet down. If you kick the bottom here, you are either kicking sea grass, fragile coral, or a sea urchin.

The crew will hand out flotation devices. Even if you consider yourself a decent swimmer, slip the belt around your waist. Floating passively on the surface without having to tread water allows you to stay quiet, breathe easy, and watch sea turtles for forty minutes without getting exhausted.

A few simple packing decisions make a significant difference on this excursion:

• Mineral sunscreen: non-mineral sunscreens containing oxybenzone are banned by Virgin Islands law to prevent reef toxicity.
• Fitted rash guard: you will spend nearly an hour with your back baking in intense tropical sun while looking down.
• Small dry bag: deck spray and wet fellow passengers will soak any canvas tote bag left sitting on open benches.
• Motion sickness remedy: take your ginger pills or dimenhydrinate an hour before leaving dock, not after the boat begins rolling on swells.
• Cash for crew tips: standard boat gratuity is 15 to 20 percent, and deckhands work hard keeping everyone safe in the water.

The water temperature at Buck Island stays pleasant year-round, ranging from 79 degrees in late February to 85 degrees in September. You never need a wetsuit, though a light neoprene top can help young kids stay warm if they tend to get chilly on breezy afternoons.

Frequently Asked Questions about buck island st thomas

Is It Worth It?

If you have already rented a car on St. Thomas and spent your days exploring Brewers Bay or Coki Beach, you might hesitate to spend extra cash on a boat tour. Do not skip it. The boat trip out to Turtle Cove delivers an open-water setting, high water clarity, and an almost certain encounter with green sea turtles in their natural habitat. Watching a mature turtle gently rise toward the sunny surface right beside you is the kind of memory that stays with you long after the suntan fades. Book a morning tour with a smaller group, lather on mineral zinc, and jump into the blue.

Read more about snorkeling in st thomas.