Watching the Aegean from below feels unreal. On this Dory glass-bottom speedboat from Kos, you can watch the sea floor and even an old shipwreck through thick windows while you zip between islands.

I also love the practical setup: two decks so you can switch between shade and sun, and a real swim break in Pserimos with easy ways back aboard. The one main consideration is that snorkeling time is limited, so underwater viewing may feel short for anyone hoping for a long, detailed session.

Key things to love on this Dory cruise

• Thick glass-bottom viewing that makes the sea floor and shipwreck feel close-up
• Two-deck comfort, with a shaded lower deck for calmer viewing and drinks
• Pserimos swim stop with time to get in the water and enjoy the bay
• Jump or slide access for the swim, rather than only ladder steps
• Short but satisfying trip length (about 150 minutes) without turning into an all-day ordeal
• Onboard bar availability for drinks and snacks if you bring cash

Glass-bottom speedboat fun from the Port of Kos

This is the kind of boat day that works fast. You’re in motion right away, and the star isn’t only where you go, it’s what you see while you’re traveling. From the lower deck, the glass-bottom windows turn the water into something you can actually study as you cruise.

The route also keeps the pace friendly. It’s long enough to feel like a real island outing, but short enough that you’re not stuck for hours waiting around. For $29 per person for 150 minutes, you’re paying mainly for transport plus the special sea-floor viewing and the swimming break—so it’s a strong value if that’s exactly what you want.

The Dory boat setup: shade, sun, and sea-floor watching

The Dory runs with two decks, and that matters more than you might think. On the lower deck, you can sit in the shade while you look down through the thick glass. It’s usually the easiest way to spot movement in the water and focus on that shipwreck moment when the crew gathers everyone around the glass.

Up top, the goal is simple: sun, breeze, and quick photo angles over the water. If you get a little sunburn-prone (or just want a break from heat), you’ll appreciate that you can swap decks without leaving the boat. It’s also a nice way to keep kids happy—shade for looking down, sun for looking around.

One practical note: this is a speedboat, and sea conditions can affect comfort. If the wind kicks up, the ride can feel bumpy. It’s not a reason to avoid the tour, but it’s a good reason to think about shoes with grip and keeping your plans relaxed.

Pserimos stop: a real swim break with snorkeling time

Pserimos is where the day turns from “cool viewing” into “get in the water.” You’ll have time for a photo stop and sightseeing as you approach, and the boat trip in the middle gives you some scenic views along the way. Then it settles into the part most people remember: the leisurely swimming stop.

This bay stop is also where your experience can vary based on conditions. If the water is calm and clear, you’ll likely enjoy both swimming and quick snorkel sightings. If it’s choppier or visibility isn’t great, snorkeling can feel more like a try-it moment than a full-on underwater adventure. Either way, you do get water time, which is often the make-or-break feature on short tours like this.

What I find especially useful for planning is the way you can re-board. There’s not only ladder access—there’s also a setup that allows jumping back in and using a slide option if you prefer it. That makes the stop feel more playful, especially for families, and it reduces the friction of getting in and out quickly.

The shipwreck moment: seeing old wood and structure up close

The highlight here is the old shipwreck viewing through the thick glass bottom. You won’t be watching it for the whole ride like a movie scene, but the crew signals when it’s time to gather around. That timing helps, because you can reposition your spot and actually focus.

What makes this part compelling is scale. At normal beach snorkeling depths, you might catch a glimpse of something and move on. From a glass-bottom boat, the sea floor fills your view instantly, so shapes and structure stand out more clearly. It’s a great way to “see” an underwater story without needing specialized gear.

Also, the shipwreck isn’t just a rumor—people consistently find it visible from the boat. That’s exactly why this tour is different from a plain ferry. You’re not only going somewhere; you’re building the main attraction into the ride itself.

Drinks, snacks, and the cash detail that trips people up

Drinks and snacks are available for purchase on board, but they are not included in the ticket price. The boat has a bar, and you can buy beverages and some snacks during the trip.

Here’s the easy planning tip: bring cash. The schedule leaves little time for back-and-forth. If you wait until you’re already on the boat and you’re short on payment options, it can turn a simple snack run into stress.

If you care about hydration and sun protection, plan to buy what you need instead of relying on it being provided. It’s common on boat tours, but this one is especially relevant because you spend time both in direct sun on the top deck and at the water during the Pserimos stop.

Timing and comfort: 150 minutes goes by fast

The total duration is 150 minutes, which is about 2.5 hours. That time window is ideal for first-timers because you get the key ingredients—views, sea-floor viewing, and a swim stop—without burning a full day of your island stay.

Expect the day to move in a steady rhythm:

• You set off from the Port of Kos
• You reach Pserimos for a mix of sightseeing/photo time and the water break
• You head back to Kos before you feel “done” with boating

Whether you’ll be happiest at the start or the end depends on your priorities. If you want the glass-bottom shipwreck viewing, you’ll want to stay near the lower deck when the crew signals. If you’re a sun person, you’ll likely love most of the top-deck time, especially during the scenic stretches.

Price and value: is $29 a smart buy?

At $29 per person, this is a budget-friendly way to experience several things in one: speedboat transport, glass-bottom sea-floor viewing, and a swim stop in Pserimos. The math works best if you want the unique underwater perspective more than you want an all-inclusive day with a big meal onboard.

If you’re the type who brings a packed snack and only buys drinks occasionally, you’ll probably feel like you got a fair deal. If you plan to purchase lots of snacks and soft drinks, the overall cost will rise. Still, even with a few extra purchases, the trip stays in the “short, focused, worth it” category compared to longer boat days.

Also consider what you’re not getting: there’s no indication that this is a multi-stop tour with lots of long land excursions. This is about water, views, and the glass-bottom moments. If you go in expecting that, you’ll likely come away happy.

What to bring (and what to avoid forgetting)

Bring the basics for sun and water time. The tour info lists the essentials, and they’re genuinely useful here:

• Sunglasses
• Hat
• Swimwear
• Towel
• Sunscreen

I’d add one practical thinking point: for re-boarding and moving around quickly, wear shoes that stay on and have grip. Even though it’s a relaxed swim stop, boat decks are slick when the water splashes.

Because you’ll likely want drinks onboard, remember the cash detail too. And if you’re sensitive to cooler conditions, consider a light layer for the ride on windy days—mid-autumn can feel brisk even if the sun is bright.

Who this tour fits best

This Dory cruise is a strong match if you want:

• A quick Aegean break from Kos
• Underwater viewing without snorkeling equipment complexity
• A swim stop that’s fun and easy to access
• A boat day where kids and adults both have something to do (looking down, then getting in)

It may feel less perfect if you’re expecting a long snorkel session with lots of time underwater. The snorkeling time exists, but the schedule is built around short, enjoyable water access rather than extended gear-based exploring.

One more consideration: it is not suitable for people over 95 years. If you’re traveling with anyone who needs extra stability or has mobility limitations, plan ahead and ask questions before boarding.

Should you book the Dory glass-bottom cruise?

If you want an affordable, time-efficient boat trip from Kos that includes glass-bottom shipwreck viewing plus a real swim stop in Pserimos, I’d book it. It’s one of those tours where the main attraction is built into the ride, so even if you’re not a die-hard snorkeling fan, you still get something memorable.

Skip it only if your top priority is extended snorkeling time or lots of shore time. This tour is designed to keep moving, keep it fun, and focus on what you can see from the boat and in that one bay stop.

FAQ

How long is the Dory glass-bottom cruise?

It lasts 150 minutes.

Where does the tour start?

It starts at the Port of Kos.

Which islands are included?

You visit Kos and Pserimos, with the main stop at Pserimos.

Is there time for swimming and snorkeling?

Yes. There’s a leisurely swimming stop in Pserimos, and snorkeling time is part of that stop.

Can you see a shipwreck from the boat?

Yes. You can view an old shipwreck through the thick glass bottom when the crew signals you to gather around the glass.

Are drinks included in the price?

No. Drinks are available to purchase on the boat for an additional charge.

What languages does the host or greeter speak?

English, German, Italian, and French.

What should I bring?

Bring sunglasses, a hat, swimwear, a towel, and sunscreen.

Is cancellation possible for a full refund?

Yes. You can cancel up to 24 hours in advance for a full refund.

Is there a reserve-and-pay-later option?

Yes. You can reserve your spot and pay later.