Two island names, one great day at sea. I like the pairing of Marietas and Los Arcos, and I like that the crew gives hands-on help so you’re not wrestling your own gear. One thing to plan for: visibility at Los Arcos can vary, and on some days it can feel less clear than you hoped.

I also appreciate the structure of the day: you’re on the water early, you get coaching, and you’re back at your meeting point the same day. The main consideration is physical and medical fit—this isn’t for anyone with heart disease or serious back/spine/knee problems, and you’ll want a moderate fitness level.

Key things to know before you go

• Early 9:00 am start from Marina Vallarta with wildlife spotting as you head out
• Marietas calls for scuba certification for underwater time (snorkel gear and life jackets are part of the experience)
• Hidden beach is optional for $25, with your deposit refunded if weather or availability blocks entry
• Los Arcos offers easy practice depths around 20 ft and a much deeper wall for advanced/technical profiles
• Good value on paper: boat ride, lunch, bottled water, equipment, life vest, and multiple marine park fees are included
• In-water coaching is a priority, which matters a lot if you’re nervous first-timer territory

Puerto Vallarta’s two-stop underwater plan

This is built for a full morning to early afternoon in Banderas Bay. You leave around 9:00 am from Marina Vallarta and spend the day at two very different sites—Marietas Islands first, then Los Arcos de Mismaloya.

The big reason this combo works for so many people is that Marietas can feel like the “wow” part of the trip, while Los Arcos is the place where you can get comfortable with your skills. If you’re new to scuba, you’ll especially care about how much instruction you get and how smoothly the crew handles the gear.

One more practical note: the tour caps the group at 14 people, which usually means you’re not stuck waiting around in chaos. That small-group feel is a quiet value-add when you’re learning control, breathing rhythm, and buoyancy.

Marietas Islands: snorkeling time, hidden beach option, and certification rules

Marietas starts fast. Right after you depart, you’ll pass the Ameca River area—it’s a classic spot for dolphin sightings, and the trip often treats it like the warm-up act for the day.

Once you reach the islands (after about the first hour), the plan shifts to water time with coaching. Snorkel gear, life jackets, and an explanation of how to get comfortable in the water are part of this stop. If you’re there for scuba, certification is required for underwater time at Marietas, so this is where you need to be honest with your credentials.

You’ll also want to think seasonally. During winter, the ocean route can be a wildlife highway, with chances for dolphins, turtles, manta rays, and whales along the way. Even if you never do a “perfect” sighting, the boat ride itself is built to reward you for paying attention.

The hidden beach add-on

There’s an optional extra: a visit to a famous hidden beach on Marietas (described as one of the top ten beaches in the world). It costs $25, paid as a cash deposit during check-in.

Here’s the practical part I appreciate: if you can’t access the hidden beach due to availability or weather conditions, they refund your deposit. That reduces the stress of paying for an activity that depends on day-to-day conditions.

Los Arcos de Mismaloya: practice depths around 20 ft and the big wall up to 1600 ft

Los Arcos is the second stop, and it’s a very different vibe. This is a national park setting designed for a range of ability levels.

If you’re working on basic skills or completing certification requirements, the area includes depths around 20 ft. That’s where you can focus on the fundamentals—breathing, staying calm, and controlling your position.

For more advanced technical profiles, Los Arcos is also described as having a dramatic wall that goes much deeper, with a reference depth up to 1600 ft. You don’t need to be technical to enjoy Los Arcos, but it does mean the site is flexible enough for different training goals.

The realistic consideration: the underwater look depends on conditions. One detailed experience note described murkier water at Arcos with less to see, while another day at Marietas produced clearer underwater moments. So, set your expectations to include variability.

Pro coaching and gear setup: why nervous first-timers tend to do well

This is one of those tours where how it runs matters as much as where it goes.

The crew provides professional instruction and assistance, including help that reduces the struggle of handling and organizing your gear. You’re not expected to arrive like you’re staging your own dive shop setup. That matters if you’re anxious, still figuring out breathing, or simply not used to the weight and feel of scuba equipment.

At Marietas, you’ll get help with snorkeling gear and life jackets, plus tips for improving how you feel in the water. That coaching tone often helps reduce the mental stress that can make early underwater time feel harder than it should.

If you’re sensitive to nerves, choose this tour because it’s designed around guidance, not just “go do it.” And if you’re returning after a long break, the structure helps you reset your fundamentals without feeling rushed.

Boat ride timing and winter wildlife odds

You’re out early, which is a big deal for wildlife. Leaving around 9:00 am gives you the best shot at calmer water and more active animals, plus it avoids the midday crowd crush.

The itinerary is built to reward observation on the travel out to the islands. The first stretch can include wildlife like dolphins and other sea life, and during winter the odds for larger sightings (including whales) tend to be better.

On the way back, the day often stays “alive,” with dolphins sometimes showing up right off the boat. Even when the underwater portion is the main event, this kind of wildlife-focused transit makes the trip feel complete rather than rushed.

If you’re the type who gets cold easily, plan for it. One experience note mentioned colder water and that extra wet suit help can be offered. Even in warm-season Mexico, water temps can still catch you off guard.

Price and value: what $125 includes and what costs extra

The headline price is $125 per person for a 4 to 6 hour outing. For scuba outings in Puerto Vallarta, the real question is what you don’t have to pay again.

What’s included in the $125

You should expect:

• Boat ride
• Use of scuba equipment
• Use of life vest
• Box lunch
• Bottled water
• CONANP (federal gov) fee
• Conservancy donation fee to Bahia Unida
• Permits for the national park

That’s a lot of “annoying line-items” that many tours make you pay separately. In practice, that’s part of the value: fewer surprises on the day.

What costs extra

Two items are clearly listed as not included:

• Beginner scuba instruction class: $25 per person
• Government fees: $6 per person

And then there’s the optional add-on:

• Hidden beach on Marietas: $25

A simple value check for your situation

• If you’re already certified, you’ll usually get the most from the base price because you avoid the beginner instruction cost.
• If you’re not certified, the $25 class becomes part of your real total. It can still be worth it, but you should treat it as required for the plan you want.

Also consider food. Lunch is provided, but one experience note suggested bringing your own snacks anyway. That’s a smart move if you’re picky or you tend to get hungry fast.

What to bring, plus safety and comfort basics

This tour comes with clear safety rules. No alcohol or drugs are allowed, and people with heart disease or significant back/spine/knee problems can’t participate. You’ll also need a moderate physical fitness level.

For age, the minimum is recommended 10 years. For many families, that’s a helpful guideline when deciding whether the day will be manageable.

What to bring:

• Your typical swim and personal comfort items (and your own mask if you prefer using familiar gear)
• Cash can be useful since the hidden beach deposit is described as paid in cash, and fees may be requested day-of
• A light layer if you tend to get chilled on boat rides

One useful tip from experience notes: even when they suggest bringing cash for fees, some payment can be done by card—there may be a 5% credit card fee. So if you’re thinking about tipping or extra charges, plan for both options.

Who should choose Marietas vs Los Arcos (and who should avoid this plan)

If you’re certified for scuba, this tour can work well because you’re set up for both sites. Marietas gives you the animal-rich reputation and coaching environment, while Los Arcos gives you a range of depths and a strong structure for skill-building.

If you’re not certified, you’ll likely need the beginner instruction class (listed at $25 per person). Also remember that Marietas underwater time has a certification requirement, so your day may focus more on snorkeling and training depending on your status.

This plan is a good fit if you want:

• Pro instruction and patient guidance
• A structured day that’s not just “water and hope”
• Small-group energy (max 14)

It may not be a good fit if you:

• Have heart disease, serious back/spine issues, or knee problems
• Feel uncomfortable with early mornings and spending hours on a boat
• Are hoping for perfectly consistent visibility every time (conditions vary)

Should you book this Puerto Vallarta Undersea trip?

I’d book it if you want a well-run outing with gear help, real coaching, and a mix of sites rather than a single-location gamble. The inclusion of permits and park fees inside the $125 price also makes it feel straightforward.

I’d think twice if you’re sensitive to water conditions. Los Arcos can be murky on some days, and the underwater look will follow the weather and currents. If clear visibility is your top priority, you’ll still get a chance to shine at Marietas, but there’s always an ocean element you can’t control.

If you’re new, bring nerves with you, not pride. The way this is set up is meant to help you get comfortable fast. If you’re already certified, this is a solid two-site structure that keeps you active and supported without turning the day into logistics work.

FAQ

How long is the Puerto Vallarta Undersea Arcos or Marietas experience?

It runs about 4 to 6 hours.

What does the $125 per person price include?

The price includes a boat ride, box lunch, bottled water, life vest, scuba equipment, and multiple fees such as CONANP, a conservancy donation to Bahia Unida, and permits for the national park.

Do I need certification to do underwater time at Marietas Islands?

Yes. You must be certified to do scuba at Marietas Islands.

Is a beginner instruction class included in the price?

No. The beginner scuba instruction class costs $25 per person and is not included.

Are there any extra fees besides the $125?

Yes. There’s $6 per person in government fees not included. There’s also an optional $25 hidden beach add-on.

What is the hidden beach add-on cost, and do I get a refund?

The hidden beach option costs $25 and involves a cash deposit during check-in. If you can’t access it due to availability or weather, your deposit is refunded.

What is the minimum age and the health requirements?

The minimum age is recommended 10 years. You also need moderate physical fitness, and it’s not recommended for people with heart disease or back/spine/knee problems. Alcohol or drugs also disqualify participation.

What’s the cancellation policy?

You can cancel for a full refund up to 24 hours before the experience start time. If you cancel within 24 hours, the amount paid is not refunded. The experience can also be canceled for poor weather, with options for a different date or a full refund.