50′ Luxury Yacht. Private Full or Half Day Catamaran Snorkel, & Beach Experience

The best part of this St. Thomas charter is control. You get the entire 50-foot SY Sirena for your group, then work with the captain to choose snorkeling spots, beaches, lunch stops, and quiet coves around St. Thomas, St. John, and nearby cays. I like the roomy bow bean bags and trampolines, and I like that the crew can adjust the route when wind makes one side of an island rough. The main catch is that the advertised list of stops is broader than what a half-day can cover, and some places, including Trunk Bay, may not be available to commercial charters.

I also like the simple all-inclusive setup: snorkeling gear, floats, bottled water, soda, beer, and signature rum punch are ready aboard. Captains and first mates have helped families with toddlers, cautious swimmers, and large groups, with names such as Maddy, Olivia, JW, Alex, Dave, Coleman, and Celina appearing often in the experience feedback. Bring lunch money, arrive on time, and tell the crew what matters most before leaving Red Hook.

Key points to know before booking

• Private boat for up to 12: The $1,595 price covers the yacht and your group, not a per-person fare.
• Flexible four to seven hours: Choose a half-day or full-day charter, then shape the route with the captain.
• Strong snorkeling focus: Sea turtles, stingrays, octopus, tropical fish, and a sunken ship have all been spotted on past outings.
• Comfortable places to spread out: The open back deck, dining area, salon, bow seating, bean bags, and trampolines give you room to move.
• Drinks and water toys included: Expect floats, snorkeling equipment, Virgin H2O bottled water, soda, beer, and rum punch.
• BVI access is not included: This boat visits St. Thomas, St. John, and nearby cays. A British Virgin Islands trip requires a different product.

What a private day aboard SY Sirena feels like

A private charter changes the rhythm of a boat day. You are not following a fixed group schedule or trying to please strangers. Your captain can ask what your group wants, then balance snorkeling, swimming, sightseeing, food, and time aboard.

That matters most when your party has mixed interests. Teenagers may want turtle sightings, younger children may prefer a float, and some adults may want a quiet ride with a rum punch in hand. The crew has worked with families whose children ranged from four months to seven years, as well as groups of 11 or 12. That does not make the boat a babysitting service, but it does suggest that the crew is used to helping families get in and out of the water and settle into the boat.

The boat has a salon opening onto a wide back deck with seats and dining space. Up front, bean bags and large trampolines make a good perch while underway. I would reserve that forward space for people who enjoy a little motion and wind, while anyone prone to seasickness may prefer a more sheltered position.

The crew also adds a human touch to the day. Maddy, JW, Alex, Dave, Captain Glen, Vic, Olivia, Coleman, Celina, Ro, and others have been singled out for friendly service, island stories, drink service, and help with equipment. Crew assignments can change, so you should not book expecting one particular person unless the operator confirms it.

How the time and $1,595 price work

The advertised duration is about four to seven hours. A half-day gives you enough time for a couple of good stops, while a full day gives you breathing room to travel farther, snorkel without rushing, and stop for lunch.

At $1,595 for up to 12 people, the value depends heavily on group size. For 12 people, the base cost works out to about $133 per person before gratuity. For six people, it is about $266 each, and for four, nearly $399 each. That makes this a strong option for a full family or friend group, but a costly choice for a small party.

The fee covers the yacht, crew, listed drinks, water, snorkeling equipment, floats, and restroom access. Lunch is not included. You can purchase food at some locations, and past itineraries have included stops such as Lovango for lunch and the Pizza Boat. Ask the captain about the day’s food plan before departure, especially if children need a meal at a particular hour.

A 15 to 20 percent tip for the captain and crew is customary for exceptional service. Include that in your budget. Also remember that arriving late can reduce your time on the water. The schedule is built around the booked departure, so do not assume the boat will stay out later to make up for a late arrival.

Choosing between a half-day and full-day charter

A half-day is a sensible choice if you mainly want a scenic boat ride, one or two snorkeling sessions, and a swim. It also works well for families with very young children or groups that have other plans in St. Thomas.

The limit is simple: you cannot visit a long string of beaches in four hours and still give each stop enough time. The listed suggestions often call for at least 1.5 hours at a stop, which is a useful clue. A half-day should be planned around one main area rather than a checklist of destinations.

A full-day charter is the better buy for a large group that wants several activities. You can spend longer in the water, stop for lunch, move between St. Thomas and St. John, and leave room for weather changes. A full day also makes sense if your group includes people who want to relax aboard while others snorkel.

Ask the captain to build the day around your top two or three priorities. If sea turtles matter most, say so. If lunch and beach time matter more than covering distance, say that instead. A private boat is valuable because the plan can reflect your group, but only if you communicate clearly.

What to expect at the St. Thomas stops

The following places are possible destinations, not a promise that you will visit all of them. The captain decides what works with the booked time, weather, water conditions, and current charter access.

Secret Harbour: This is a practical choice for a quieter swimming or snorkeling stop. Its protected feel can be useful when wind makes open water uncomfortable. It may suit a group that wants an easy first swim without spending the whole day crossing between islands.

Brewer’s Bay: On St. Thomas, Brewer’s Bay offers another option for swimming and snorkeling. It can be a good alternative when your group wants a different setting from the more famous beaches. Ask the captain about current conditions before making it a centerpiece of the day.

Magens Bay Beach: Magens Bay is one of St. Thomas’s best-known beach settings and a natural choice for scenery and a swim. Its fame also means it may not feel as secluded as a smaller cove. Treat it as a scenic beach stop, not necessarily your best snorkeling stop.

Sapphire Beach: Sapphire gives you a classic St. Thomas beach setting and can fit well into a day that mixes swimming with views. It is one of several choices, so the captain can steer elsewhere if the water or schedule favors another bay.

Coki Point Beach: Coki Point is associated with active beach time and easy access to the water. It can suit a group that wants a lively stop, but a private charter does not guarantee a private beach experience. Ask how crowded conditions are before committing valuable time.

Lindqvist Beach: Lindqvist offers a more low-key beach option for a swim and a stretch of sand. It can work well for groups that want a less programmed stop, though the best choice depends on the day’s wind and sea conditions.

The St. John route, from Cruz Bay to Maho Bay

The charter can visit St. John, with pickup from Cruz Bay possible by advance request after booking. The normal departure point is American Yacht Harbor in Red Hook, St. Thomas, so confirm the pickup plan before you arrive.

Honeymoon Beach: This is a strong choice for a relaxed swim and beach time. It fits a slower itinerary where you want to enjoy one place rather than rush between several bays.

Francis Bay: Francis Bay offers room for a longer swim and a quieter feel than the most famous St. John beach stops. It works well for a group that wants time in the water without packing the day too tightly.

Trunk Bay Beach: Trunk Bay is an obvious name on a St. John wish list, but access is an important warning here. A recent charter restriction has meant that commercial boats may not be allowed to stop there, despite it appearing among possible destinations. Confirm this before booking if Trunk Bay is essential to your plan.

Maho Bay Beach: Maho is a popular place to hope for sea turtle sightings, although wildlife is never guaranteed. It is especially appealing for families and first-time snorkelers because the turtle possibility adds excitement without requiring a complicated schedule.

Waterlemon Cay: Waterlemon Cay is a notable snorkeling target and can reward a full-day plan. Reaching it may take more travel time, so it is not the best choice if you want to stay close to Red Hook and maximize beach hours.

Scott Bay Beach and Hansen Bay Beach: These St. John options can help the captain find a calmer or less crowded place when conditions change. They are useful names to keep in mind if your group values quiet water more than famous scenery.

Snorkeling and wildlife are the real highlight

The strongest reason to book this boat is not simply sitting on a catamaran. It is having a crew that can guide your group toward good water for the day and help everyone use the equipment.

Past outings have included sea turtles, stingrays, octopus, tropical fish, and a sunken ship. Those sightings are possible, not promised. The captain may choose a different reef or bay if wind, visibility, or boat traffic makes the original plan less appealing.

The crew can help fit snorkeling gear, point out sea life, and assist people in and out of the water. One family described a useful arrangement in which the crew watched a child on the boat briefly while the parents snorkeled. That kind of help can make a private charter much easier for parents, but you remain responsible for your children.

If someone in your group does not swim well, say so early. The included floats offer extra comfort, and a crew member can explain the water entry points, but the boat is still an active water experience. The restroom aboard is another useful feature, especially for a full-day trip.

Food, drinks, and what you should pack

The boat provides Virgin H2O bottled water, soda, beer, and Seas the Day signature rum punch. Ice is included, so you do not need to organize a cooler full of drinks.

Lunch is separate. You may buy food at certain stops, and some groups have arranged meals at Lovango or the Pizza Boat. Food plans can affect the route and timing, so discuss them during the pre-departure conversation rather than treating lunch as an afterthought.

I would bring reef-safe sunscreen, a hat, sunglasses with a strap, a swimsuit, a towel, and a dry change of clothes. Pack any child-specific snacks or meals you need. Keep valuables limited, since the main pleasure of the day is being in and around the water.

The operator uses eco-friendly water practices and says the boat is sanitized after each trip. Service animals are allowed, most people can participate, and the activity is primarily outdoors. Masks are not required, though you can wear one if you prefer.

Weather, crew service, and the limits of flexibility

The boat can adjust its route when the wind picks up. One family had a good day despite a windy week because the crew found calmer areas on the sheltered sides of the islands and in coves. That is one of the real benefits of a captain who knows the local water.

Still, flexibility has limits. The captain must make the final call on safety and access. The boat cannot visit the British Virgin Islands, and St. John stops can be limited by charter rules. The Trunk Bay restriction is the clearest example, so ask for a current route plan before departure.

Service has been praised for being attentive, funny, and helpful, especially during snorkeling and family outings. One very poor account also describes dissatisfaction with communication, life-jacket expectations, timing, and the handling of a late arrival. The operator disputed those claims and stated that adequate life jackets were aboard. The practical lesson is to arrive on time, ask direct questions, and confirm what your group expects before casting off.

Free cancellation is available if you cancel at least 24 hours before the start time. Within 24 hours, changes and refunds are not accepted. If poor weather cancels the trip, you are offered another date or a full refund.

Who should book this St. Thomas catamaran?

I would choose this charter for a family reunion, birthday, wedding group, or friend group that can fill much of the 12-person capacity. It is also a good fit if privacy matters, since only your party participates.

Families with young children can benefit from the space, restroom, floats, and attentive crew. Strong swimmers and snorkelers will appreciate the chance to spend more time at the best water rather than follow a fixed timetable. First-time boaters can also enjoy the experience without having to plan every mile themselves.

I would think twice if you have only two or three people, since the group price becomes harder to justify. I would also avoid booking it solely for Trunk Bay or the British Virgin Islands. Neither is a safe assumption for this boat.

FAQ

Where does the charter leave from?

The standard meeting point is American Yacht Harbor, 84GX+24H, Smith Bay Road, Red Hook, St. Thomas. The trip ends back at the same meeting point.

How many people can join the private charter?

The price covers up to 12 people, and only your group participates.

How long does the experience last?

You can choose a half-day or full-day charter. The stated duration is approximately four to seven hours.

Can the captain customize the route?

Yes. You and the captain can design an itinerary around snorkeling, beaches, swimming, sightseeing, lunch, and the needs of your group.

Is lunch included?

No. Lunch is not included, though you can purchase food at some locations.

What drinks and equipment are included?

The boat includes bottled Virgin H2O water, soda, beer, signature rum punch, ice, snorkeling equipment, and floats.

Can the boat visit the British Virgin Islands?

No. The BVI is not available on this vessel. A separate product is required for a BVI trip.

Can I request pickup from Cruz Bay on St. John?

Pickup from Cruz Bay is possible with an advance request after booking.

What happens if the weather is poor?

If the operator cancels because of poor weather, you can choose another date or receive a full refund. You can cancel for a full refund up to 24 hours before the start time.

Should you book it?

Book this St. Thomas catamaran if you can share the cost across a sizable group and care more about a private, flexible day than a fixed list of beaches. The combination of space, snorkeling gear, floats, drinks, and crew help gives you a comfortable way to see the waters around St. Thomas and St. John.

Before paying, confirm your pickup point, ask which stops are currently open to commercial charters, and decide if you want a half-day or full day. If your group arrives on time, communicates its priorities, and treats the route as weather-dependent, this is a strong choice for a relaxed day on the water.