Private Fast Power Catamaran. Full or Half Day for Beach Hopping, Snorkel & Swim

The best part of this St. Thomas charter is the freedom to make the day yours. A captain such as Holly, Amanda, Wallens, or Glen can steer your private group toward turtle snorkeling, a quiet beach, a beach bar, or a mix of all three aboard MV Poseidon, a roomy 36-foot power catamaran.

I like the boat’s stable twin-hull design and the fact that the charter covers up to 12 people, not just two or four. I also like the practical extras: snorkel gear, water, ice, soda, beer, U.S. park fees, and mooring permits are included.

The catch is cost. The $895.50 boat price can be a good deal for a larger group, but fuel is extra at $8 per gallon, and a 15 to 20 percent tip is expected. Also, the sample stop list is far too ambitious for one day.

Key points at a glance

• Private boat for up to 12: Your group does not share MV Poseidon with strangers.
• Fast but steady ride: The 36-foot TwinVee power cat offers speed and a stable platform for island hopping.
• Captain-led planning: Your captain can shape the route around snorkeling, beaches, drinks, and sightseeing.
• Strong snorkeling potential: Turtle sightings are common possibilities, with fish, coral, stingrays, starfish, octopus, and other sea life possible.
• Useful inclusions: Snorkel equipment, water, soda, beer, U.S. park fees, and mooring permits are covered.
• Budget carefully: Add fuel, gratuity, and any purchases at beach bars or island restaurants.

Setting out from American Yacht Harbor in Red Hook

Your day begins at American Yacht Harbor on Smith Bay Road in Red Hook, on the eastern side of St. Thomas. The charter returns you to the same harbor, so you do not need to arrange a separate ride back from another island.

This is a private activity, which matters most when your group has mixed interests. One person can snorkel while another prefers a beach stop. Children can have time in shallow water, while adults may want a longer swim or a drink ashore. You tell the captain what sounds good, and the route is adjusted around weather, sea conditions, and available time.

Plan to arrive early. One half-day group lost part of its four hours after arriving late and completing the required paperwork. Fifteen minutes before departure is the sensible target. That small bit of planning protects the time you paid for.

After a safety briefing, your captain will ask what you want from the day. Captains named in the feedback include Holly, Amanda, Wallens, Glen, Aaron, Mike, Bryan, Brian, Kyle, Hillary, and Valley. The repeated strength across these accounts is not just boat handling. It is the captains’ ability to explain the islands, point out sea life, and adjust the pace to suit children, cautious swimmers, and experienced snorkelers.

Why MV Poseidon works for a private group

MV Poseidon is a 36-foot TwinVee Ocean Cat with twin hulls. That design gives the boat a broad, steady feel while still letting it cover distance between St. Thomas, St. John, and nearby cays at a useful pace.

The boat is described as comfortable and designed to keep passengers dry. That is valuable in the Caribbean, where a fast ride can otherwise mean a face full of spray. The low draft also lets the boat get close to beaches, and the transom ladder makes getting in and out of the water easier.

For 12 people, the size is a real advantage. You have room for a full family or friend group without crowding onto a small open boat. For a party of four, it may feel like more boat than you need, but that extra room can be welcome when you are carrying towels, bags, snorkel gear, and lunch plans.

The onboard Fusion stereo lets you play music during the ride. That helps set the mood, but remember that the boat is still a working vessel. Keep the volume reasonable so you can hear the captain’s directions and safety information.

Planning a half-day or full-day route

The advertised duration is about four to seven hours. In practical terms, the half-day option works best for two or three water stops plus a beach or lunch break. The full-day option gives you time to slow down, stay longer at a favorite cove, or combine more snorkeling with a meal ashore.

Do not try to force every named stop into one charter. Water Island, Little Buck Island, Secret Harbour, Honeymoon Beach, Trunk Bay, Scott Bay, Maho Bay, and Magens Bay stretch across a wide area. Even in a fast boat, weather, water conditions, anchoring, swimming time, and beach access all take time.

A full-day group reached only three locations in rough water. That is not a failure. It is a useful reminder that a good day on the water is not a checklist. Choose a region or theme instead.

For example, you might ask for:

• A St. John snorkeling day with Maho Bay and another nearby reef
• A beach-focused outing with Honeymoon Beach and a casual lunch
• A turtle and fish trip with time for a private-feeling beach stop
• A relaxed route with one snorkel site, lunch, and music on the ride home

Your captain can explain which stops fit the weather and your group. The smartest plan is to name your top two priorities, then let the captain build around them.

What to expect at Water Island

Water Island is one of the possible opening stops from St. Thomas. It can work well when you want a quick look at the nearby islands without spending the entire morning running across the water.

The listed time is 30 minutes, but the actual stop can vary. Use it for a short swim, a look at the shoreline, or a quick first taste of island hopping. If snorkeling is your main goal, ask whether another nearby site offers better water conditions before committing to a brief stop here.

The benefit of Water Island is flexibility. It is close enough to fit into a shorter charter, especially when your group wants scenery and swimming without a long run.

Little Buck Island for a focused water stop

Little Buck Island is another possible 30-minute stop. The island is included as an option rather than a promise, since the captain sets the final route with you.

This kind of stop is useful when you want to stay on the water instead of going ashore. Bring your attention to the sea and ask the captain what you are likely to see that day. Conditions change, and fish do not always cooperate. One disappointing outing produced turtles but fewer colorful fish than expected, a fair reminder that nature sets the schedule.

If your group includes first-time snorkelers, a short stop can also be enough. You can test masks, get comfortable in the water, and decide if you want to spend more time at the next site.

Secret Harbour and the value of a shorter itinerary

Secret Harbour can suit a group looking for a compact outing. A half-day charter cannot cover every corner of the Virgin Islands, so a stop near St. Thomas helps preserve time in the water rather than spending it all traveling.

The charter’s private format is especially useful here. You do not have to follow a fixed timetable built for a large crowd. If everyone is enjoying the water, you can ask to stay longer. If the group is ready for a beach, lunch, or a change of scenery, the captain can move on.

That freedom is the main reason to choose this over a cheaper shared excursion. You are paying for control of the day, not just a seat on a boat.

Honeymoon Beach for easy beach time

Honeymoon Beach is one of the more practical choices for a mixed-age group. The boat’s low draft and ladder allow MV Poseidon to approach close to shore, which can make a short beach visit easier than a long transfer in a tender.

A family with a toddler used a stop near Honeymoon Beach so the child could play on the sand while the older members enjoyed the water. That is the sort of small adjustment that makes a private charter worthwhile.

Beach time also gives non-snorkelers a real role in the day. You can swim, walk on the sand, have a drink, or simply take a break from the boat. Ask about current beach access and conditions, since the captain must work with the tide, weather, and local rules.

Trunk Bay and the St. John option

Trunk Bay is a major St. John destination and can be part of a full route. It is a good choice if your group wants a famous beach combined with a boat ride and time in the water.

The practical question is time. Crossing to St. John and returning to Red Hook leaves less room for many separate stops. If Trunk Bay is a priority, say so at the start and accept that you may see fewer other locations.

The charter can also be booked for a British Virgin Islands route under a separate product. This particular experience covers the U.S. Virgin Islands, so do not assume that a BVI visit is included in the quoted price.

Scott Bay and Maho Bay snorkeling

Scott Bay is listed as another possible half-hour stop. It may work as part of a St. John-focused route, especially if you want to split the day between snorkeling and a quieter shoreline.

Maho Bay has drawn particular attention for sea turtles. One family with children ages five and seven managed to snorkel at three beaches, while a 62-year-old family member who was uneasy about the water felt comfortable getting in at Maho Bay. That suggests this stop can work for a range of confidence levels, though comfort always depends on the individual and the day’s water conditions.

Do not treat turtles as guaranteed. They are wild animals, and sea conditions affect visibility. Still, turtle encounters are one of the strongest reasons to choose this charter. Other possible sightings have included tropical fish, stingrays, starfish, an octopus, a lemon shark, and a sunken sailboat.

Magens Bay and the limits of the sample route

Magens Bay is a beautiful St. Thomas stop and an appealing choice if your group wants a well-known beach without crossing to St. John. It can also make sense at the end of a shorter route because it keeps you closer to home.

The important point is that the eight-stop sequence is a menu of possibilities, not a realistic one-day schedule. You cannot reasonably expect to visit Water Island, Little Buck Island, Secret Harbour, Honeymoon Beach, Trunk Bay, Scott Bay, Maho Bay, and Magens Bay in one full-day charter while also allowing time to swim, snorkel, eat, and relax.

Ask your captain to help rank the stops. Three good locations with time to enjoy them will beat eight rushed photo stops.

Snorkeling, safety, and sea conditions

New snorkel equipment is included, along with bottled water, soda, beer, ice, and U.S. park fees. The captain provides the boat and instruction, but you remain responsible for being honest about your comfort in the water.

The captains receive strong praise for giving safety briefings and taking safety seriously without making the day stiff. That balance matters when children are aboard or when someone is nervous about deep water. Captain Valley, for example, helped one passenger get past a fear of open water.

Rough seas can change the feel of the ride. One full-day outing took place in very choppy conditions, but Captain Aaron adapted the plan and still made the most of the day. If you are prone to seasickness, ask about conditions before departure and bring any medication you normally use.

The water may look perfect from the boat, but visibility and marine life vary. Turtle sightings are a realistic possibility, while a large variety of fish is not guaranteed at every stop. Listen to the captain’s advice about where conditions are best that day.

The real cost of the charter

The base price is $895.50 for the entire boat, for up to 12 people. That works out to about $75 per person if you fill every place. For six people, it is roughly $149 per person before fuel and tip. For four people, the starting cost is about $224 per person.

Fuel is added at $8 per gallon. The listed average is 15 to 25 gallons for a half-day and 30 to 45 gallons for a full day. That means an estimated fuel charge of $120 to $200 for a half-day, or $240 to $360 for a full day.

A 15 to 20 percent gratuity is recommended. Drinks and meals at places such as Dinghy’s, Margaritaville, Lime Out, or Lovango are separate expenses. Ask how fuel will be calculated for your exact route before departure so your final budget is clear.

For a large family or group of friends, this can be a strong value. You get privacy, a custom route, a captain, gear, drinks, and the ability to avoid a crowded group boat. For two people, the math is much harder to justify unless privacy and flexibility are your top priorities.

Who should book MV Poseidon

I would choose this charter for a group that wants control. It suits families with different energy levels, friends who want to bring their own music, and anyone who prefers three good stops over a fixed tour schedule.

It is also a good fit for people who want a captain with local island knowledge. Captains Holly, Amanda, Wallens, Glen, Aaron, and Bryan are repeatedly singled out for explaining island history, identifying sea life, and making the day feel personal.

You should think twice if you want a low-cost outing, a guaranteed number of beaches, or a strict sightseeing checklist. You should also be realistic about the weather. The charter requires good conditions, and poor weather can lead to a new date or a full refund.

Free cancellation is available up to 24 hours before the start time. Last-minute changes or cancellations are not refunded under the stated policy.

Should you book this St. Thomas power catamaran?

Book it if you have at least six people, care about privacy, and want to shape your own day around snorkeling, turtles, beaches, and lunch stops. MV Poseidon gives you a stable, comfortable base, and the captains seem especially good at working with families and mixed groups.

For the best value, reserve early, arrive 15 minutes before departure, budget fuel and gratuity, and choose your top two or three priorities. Do not promise yourself all eight named beaches. If your group wants an unhurried day with a captain who can change course when the sea or your mood changes, this private charter is a smart St. Thomas splurge.

FAQ

Where does the private catamaran charter begin?

The tour begins at American Yacht Harbor, 84GX+24H, Smith Bay Road, Red Hook, St. Thomas, USVI.

Where does the charter end?

The activity ends back at American Yacht Harbor, the same place where it begins.

How long does the experience last?

The charter lasts approximately four to seven hours, depending on the option selected.

How many people can join?

The private boat accommodates up to 12 people, and the price is for the entire boat.

Is a captain included?

Yes. A captain is included. Gratuity is not included, and a 15 to 20 percent tip is recommended.

Is snorkeling equipment provided?

Yes. Snorkeling equipment is included.

Are drinks included?

Bottled water, soda, ice, and beer are included. Drinks or meals purchased at beach bars and restaurants cost extra.

Is fuel included in the price?

No. Fuel is billed separately at $8 per gallon. The stated average is 15 to 25 gallons for a half-day and 30 to 45 gallons for a full day.

Can the charter visit the British Virgin Islands?

A BVI visit can be booked under a separate product. It is not included in this U.S. Virgin Islands experience.

What happens if bad weather cancels the trip?

If poor weather causes the charter to be canceled, you will be offered another date or a full refund.

Can I cancel for a full refund?

Yes. You must cancel at least 24 hours before the experience start time for a full refund. Cancellations or changes made less than 24 hours before departure are not accepted for a refund.