A fast boat makes island time feel longer. MV Poseidon is a 36 ft TwinVee power catamaran that’s built to be stable at speed, so you can spend more time on reefs and less time fighting the waves. You get the fun of beach bars and snorkel stops, plus a private day shaped around your group.

I especially like two things about this charter: the boat’s low draft and transom ladder help you get close to shore, and the day is set up for easy water time with snorkeling gear and included drinks. One real consideration is the cost stack: $895.50 covers the boat for up to 12, but there’s a fuel surcharge and tips on top, so the value depends on how many of you are sharing.

Key things to know before you go on MV Poseidon

• Private boat for up to 12: you control the pace and stops, not a rigid group schedule.
• Speed with comfort: the TwinVee design aims for stability while staying quick between beaches.
• Built for beach entry: low draft plus a transom ladder makes getting in and out of the water easier.
• Snorkel gear included: you can jump straight into the reef time without hunting for rentals.
• Park fees and mooring permits included: you should spend less time worrying about small charges while on the water.
• Pick your snorkel appetite: some days lean toward turtles and calm reef moments, others toward beach hopping and views.

MV Poseidon in St Thomas, fast rides and easy getting-in-the-water

If you picture St Thomas as a bunch of separate viewpoints and scattered beaches, this is the best way to connect the dots quickly. MV Poseidon is a 36 ft TwinVee Ocean Cat run as a private charter, and the whole pitch is speed plus stability, meaning you can move between bays without feeling like you’re on a wild roller coaster.

The other practical win is comfort. The boat is described as “most comfortable on the island,” and the design notes matter: TwinVee power catamarans tend to keep the deck steadier than smaller skiffs, which is a big deal when you’re carrying snorkel gear and trying to keep kids calm.

Most trips are around 4 to 7 hours, so you’re not stuck on the water all day unless you choose to go long. That flexibility is also useful if weather shifts or if your group wants extra time at one favorite spot.

Price Breakdown, what $895.50 really means for your group

The headline number is $895.50 per group, up to 12 guests. That is for the private boat, and it is often best value when you’re filling the group size, because the per-person math drops fast when you can split the cost.

Here’s the helpful way to look at it: if you bring a full crew of 12, you’re effectively around $75 per person for the boat itself. If you only have a smaller group, the per-person cost climbs, and then the extra line items matter more.

And yes, there are add-ons:

• Fuel surcharge: billed at $8 per gallon, with estimates of 15 to 25 gallons for a half day and 30 to 45 for a full day.
• Fuel range to expect (group total): about $120 to $200 for a half day and about $240 to $360 for a full day, based on those gallon estimates.
• Tip: not included, and 15 to 20 percent is recommended.

The included list is what keeps this from feeling like a random upsell parade. Your charter includes U.S. park fees, mooring permits, water, ice, soda/pop, beer, snorkeling equipment, and the captain. For families or groups who would otherwise buy drinks and rentals separately, that inclusion is where the value shows up.

Your private itinerary, why “sample stops” still work

You get help designing your day. The captain works with your group to set the route, and the stop list gives you strong options across St Thomas and St John waters.

A realistic expectation: you might not hit every single beach listed in the full stop set. That’s not a trick, it’s how time works when you’re traveling by boat and swapping between snorkeling and beach time. If conditions are rough, if your group slows down for photos, or if snorkel time runs longer than planned, you’ll likely trade off the total number of stops.

That flexibility is the main advantage over a fixed tour bus style schedule. You are not just going to places, you’re shaping the order to your group’s energy level. Want more time to swim? Ask for it. Want a beach break with less water? Build that in.

Stop by stop, Water Island to Secret Harbour and beyond

Instead of one long “drive and drop,” this charter is a sequence of short beach and water moments. Many stops are listed at about 30 minutes, which tells you the pacing style: fast enough to see multiple bays, focused enough to still do real snorkeling.

Water Island, a lighter start near St Thomas

Water Island is often a good first stop because it sets a calm rhythm early in the day. You get that first taste of the water, the coastline views, and the idea that you can step off into shallower areas.

The watch-out here is timing. If you start snorkeling immediately, you might burn through energy for later stops. If you’re traveling with kids, it can be better to do a quick look first, then save longer “swim and snack” moments for the best reef locations.

Little Buck Island, reef time with major marine payoff

Little Buck Island is a strong snorkel and swim candidate. Admission is listed as included, so you are not juggling extra charges mid-day for this specific nature spot.

This is also one of those places where your captain’s instincts matter. When the day is going well, this kind of location can deliver that “wow, this looks like an aquarium” feeling. If you’re hoping for sea turtles, it’s the type of stop that often makes that happen, though nature always has its own agenda.

Secret Harbour, a beach-and-water reset

Secret Harbour is the kind of stop that can balance the day. If you have already snorkeled once, you can treat this as a reset, swim casually, and get back some energy.

The drawback is also simple: the more you try to treat every stop as peak snorkeling, the less satisfying each moment can become. I like using stops like this for photos, slow swimming, and staying unhurried.

Honeymoon Beach, a family-friendly swing in the route

Honeymoon Beach shows up as a great option for beach hopping. It’s listed as an included admission stop, and it tends to be perfect when your group wants sand time without giving up the water.

If you’re traveling with mixed ages, this is a spot to consider for the “in between” crowd. Kids can play in shallow areas, while adults get in and out quickly using the boat’s gear and ladder setup.

Trunk Bay Beach, famous for a reason, but mind the time

Trunk Bay is one of the most recognizable names in the region. It’s listed with admission included, and the whole reason to go is the chance to connect with a reefy beach experience that feels close to postcard St John.

The consideration is time discipline. With only so many minutes at each stop, you’ll enjoy Trunk Bay more if you decide ahead of time whether you want long snorkel stretches or a beach-and-water blend. When you keep it focused, you end up feeling satisfied instead of rushed.

Scott Bay Beach, another reef-forward choice

Scott Bay Beach appears as an included admission stop, which signals it’s treated as a serious water spot. This is a good option for groups who want more consistent snorkeling rather than alternating between mostly beach time and mostly travel time.

This can also be where your group learns its own comfort limits. Some people are thrilled once they’re in the water, and others get cold or tired faster than they expected. The best captains adjust your pacing around that.

Maho Bay Beach, snorkeling that can get you close to wildlife

Maho Bay is listed with admission included. If wildlife encounters are your “must,” this is the kind of stop your captain will likely place when the day is lining up well.

I also like that the boat setup makes it easier to get in and out without a complicated transfer. Low draft and ladder access help the whole process feel smoother, especially when people are wearing life jackets and juggling snorkel masks.

Magens Bay Beach, views plus a classic St Thomas feel

Magens Bay is another included admission stop and a strong closer for a day. By the time you reach Magens, your group is usually ready for that final stretch of swimming or a relaxed beach finish.

One drawback to plan for is fatigue. It’s easy to overbook your day with “one more swim” energy. If you’re going full day, Magens can be better as your wind-down stop, not your last frantic snorkel mission.

Snorkeling gear, turtles, fish, and what you should expect realistically

The charter includes snorkeling equipment, plus you have time at multiple reef and beach stops. That means you can focus on enjoying the water instead of hunting for gear or figuring out where to rinse off.

You might see sea turtles and colorful reef fish. Some encounters described in captain stories include turtles, starfish, stingrays, and even bigger sightings like an octopus or a lemon shark. Still, don’t treat wildlife like a checklist. Visibility, water temperature, and animal behavior can shift, and your best outcome comes from getting in the water at a few solid stops, not one.

Also, gear comfort matters. If you’re sensitive about fit, test your mask early in the day. It makes later snorkeling calmer, especially if you’re traveling with kids.

Onboard comfort, music on deck, and how you stay dry

One reason this charter feels more “vacation” and less “transport” is the onboard experience. MV Poseidon includes a FUSION stereo, so you can keep the mood going while cruising between stops.

The boat is described as designed to help guests stay dry. That matters when you’re switching between snorkeling and beach time, because wet, cold, and salty can wear people down fast.

And then there’s the entry method. The boat’s low draft and transom ladder are designed so you can be dropped closer to shore, basically “a few feet from the beach.” That reduces the hassle factor and makes shore time feel easier for everyone, including younger swimmers who may not want to wade for a long stretch.

Captains and personalities, safety first with a social vibe

This is a private charter, and that changes everything about the captain-guest relationship. The captain isn’t just driving, they’re shaping your day and helping you get the most out of the water time.

Across different captain styles, a consistent pattern shows up: safety briefings are serious, and captains also make the day social and informative. You’ll see names like Holly, Glen, Amanda, Wallens, Hillary, Mike, Kyle, Aaron, Brian, and Vic tied to strong recommendations, often with praise for being interactive and adjusting to what the group wants.

If you want island history mixed in with reef spotting, this is a good format. If you want quiet, you can still keep it chill, because it’s your group and your music.

Half day vs full day, choosing the right amount of water time

A half day can be a perfect move if you’re also doing beaches on your own, dining reservations, or a day tour elsewhere. You’ll typically get a few meaningful stops, and the pacing feels more like a highlight reel.

A full day makes sense if your group wants variety: more snorkeling attempts, more beach time, and more chances to find the “best” water of the day. The trade-off is that you will be managing energy and weather, and it may be unrealistic to visit every listed beach in one outing.

Rough water can also influence the number of stops, because the captain may adjust the route to keep things safe and comfortable. In those cases, you can still have a great day, just with fewer locations.

Where this charter fits best in your St Thomas plan

This is a strong choice if you:

• Want private boat time instead of a crowded group tour
• Have kids or mixed-age travelers and need a smoother transition from boat to water
• Care about snorkeling and want multiple chances at turtles, fish, and coral
• Prefer a day built around your interests, not a rigid route

It may not be the best fit if you are traveling on a very tight budget per person, because the total cost rises when your group is smaller and when fuel plus tips are added. It also may be less ideal if you hate the idea of weather affecting the schedule, since good conditions are required.

Should you book MV Poseidon for beach hopping and snorkeling?

If your goal is a private day that combines speed, comfort, real snorkeling stops, and included drinks, I think this is an easy yes for many groups. The biggest reasons are practical: snorkeling gear and beverages are included, U.S. park fees and mooring permits are handled, and the boat is set up to help you get to shore with less fuss.

My advice is simple. If you can fill the boat near the top end, the value feels strongest. If you’re going with a smaller group, plan for the fuel surcharge and tip so you’re not surprised by the final total.

Finally, decide what your group wants most: sand time, snorkeling time, or a mix. Then build your day around that, so each stop earns its place.

FAQ

How many guests can this private catamaran tour accommodate?

The MV Poseidon private charter is priced for a group of up to 12 guests.

What is included in the tour price?

Your private charter includes snorkeling equipment, bottled water, soda/pop, beer and alcoholic beverages, and the captain. It also includes U.S. park fees and mooring permits.

Is fuel included, or is there an extra charge?

Fuel is not included. There is a fuel surcharge billed at $8 per gallon, with estimates of 15 to 25 gallons for a half day and 30 to 45 gallons for a full day.

How long is the tour?

The tour duration is listed as approximately 4 to 7 hours.

Which stops might be included during the trip?

Stops shown include Water Island, Little Buck Island, Secret Harbour, Honeymoon Beach, Trunk Bay Beach, Scott Bay Beach, Maho Bay Beach, and Magens Bay Beach.

What is the cancellation window if weather or plans change?

Free cancellation is available up to 24 hours in advance for a full refund. The experience requires good weather, and if it is canceled due to poor weather, you’ll be offered a different date or a full refund.