An Aegean Sea Adventure on Glass-Bottom Speedboat Dory!

The best part of this short Aegean outing is the glass-bottom viewing. As Dory heads from Kos toward Pserimos, you can watch the sea below, then gather around the thick glass to see an old shipwreck resting near the coast. It gives the boat ride a clear purpose beyond simply getting from one island to another.

I like the choice between a shaded lower deck and a sunny upper deck. I also like the long stop at Pserimos, where you have time to swim, snorkel, and possibly go ashore rather than merely pause for a quick photograph. The main drawback is that the underwater viewing can be brief, and snorkelers may find little marine life in the swimming area.

Key points to know before boarding

• The shipwreck is viewed through Dory’s glass floor, with a signal telling you when to gather around the viewing area.
• Pserimos gets about 80 minutes, enough for swimming, snorkeling, scenic views, and some time on land.
• Two decks give you a choice, with shade below and open sun above.
• The speedboat ride can feel lively, especially when there is a headwind.
• Drinks and snacks cost extra, and cash is recommended for the onboard bar.
• The $29 price is strong for a half-day sea outing, especially if you want swimming time without paying for a full-day cruise.

A quick sea escape from Kos Port

Dory leaves from the Port of Kos, making this an easy add-on if you are staying in Kos Town or spending a few days on the island. The full trip lasts 150 minutes, so you get a proper taste of the Aegean without giving up an entire day.

The boat is built for speed, but this is not only a transport run. Its glass bottom lets you look beneath the surface during the ride, while the two-deck layout gives you a practical choice of seats. Sit below if you want shade and a calmer place to enjoy a drink. Move upstairs if your priority is sunshine, open views, and a stronger sense of speed.

The boat can feel lively on the water. A ride toward Pserimos may become choppy in a headwind, which some people will find exciting and others may find tiring. If you are sensitive to motion, sit where you feel most stable and keep your sunglasses and hat secure.

The crew provides service in English, German, Italian, and French. No individual guide names are provided, but multilingual hosting makes the trip easier for visitors who do not speak Greek.

The ride from Kos to Pserimos

The crossing is part of the fun. Dory is a sleek speedboat, so you cover the water quickly and get changing views of the Kos coastline and open sea. You can spend the ride watching the horizon, feeling the wind, or checking the water through the glass below.

The glass floor is most useful when the boat slows or stops at a point of interest. Do not expect a long, guided underwater presentation. The shipwreck viewing is a short feature within a broader boat trip, and the crew signals when it is time to gather around the glass.

That timing matters. If you stay upstairs in the sun or remain at the bar, you could miss the best moment. Listen for the crew’s signal and move promptly to the viewing area. The old wreck sits close to the coast, and clear conditions can make it easy to see through the thick glass.

The shipwreck adds a touch of mystery to an otherwise scenic ride. You are not visiting a major archaeological site or exploring a large underwater area, but you are seeing something that gives the sea below a story. For many people, that brief view will be more memorable than simply looking at blue water.

Pserimos and the 80-minute swimming stop

Pserimos is the heart of the trip. The stop lasts about 80 minutes, giving you a useful block of free time rather than a rushed ten-minute photo break.

You can swim from the boat in clear water, snorkel, enjoy the views, or go ashore. The stop is flexible enough for different types of visitors. If you want to get wet, bring swimwear and a towel. If you prefer to stay dry, use the time for photographs or a quiet look around the shore.

The swimming area is attractive, but keep your expectations realistic. Snorkeling here may show you some fish, yet it is not presented as a major reef site. Some people may find the underwater life limited. The strongest reason to bring a mask is the pleasure of looking below the surface in clear water, not a promise of abundant sea life.

The lagoon can also become crowded, particularly in the busier summer months. A full boat means more people using the swimming area, the ladder, and the onboard facilities. If personal space matters to you, the upper deck may give you a better place to settle between swims, though sun exposure can be strong.

One useful feature is the choice of how to enter the water. You can use the ladder or, according to the onboard setup, take the slide. That makes the stop more appealing for children and adults who enjoy a little playful action. A family with a four-year-old found the outing manageable, although parents should still keep close watch around the water and boat.

Swimming, snorkeling, and the water temperature

The stop is designed for a relaxed swim, not a formal lesson or a guided snorkeling session. You choose your own pace and decide how long to stay in the water.

Bring sunscreen, a hat, and sunglasses, since much of the trip takes place in open sun. A towel and swimwear are essential if you plan to enter the sea. The upper deck can provide a fine place to dry off, but there is no reason to count on shade there.

Water temperature changes with the season. In mid-October, the sea can feel cool but refreshing. Summer visitors are more likely to find the swim comfortable, though conditions can vary. If you are visiting late in the season, pack a dry layer for the ride back to Kos.

Snorkeling is available, but the supplied information does not promise equipment rental or a guided session. Bring your own mask and snorkel only if you know they are permitted and convenient to carry. Otherwise, treat the snorkeling as an optional extra rather than the main reason to book.

The most reliable water-based pleasure is the swim itself. The clear sea, the open setting, and the chance to enter directly from Dory make the stop worthwhile even if fish are scarce.

Choosing between the two decks

Dory’s two-deck design solves a common boat-trip problem: some people want sun, while others want shade.

The lower deck is the better choice if you want protection from the Greek sun or prefer to sit near the bar. You can buy drinks and snacks onboard, but they cost extra. Bring cash, since that is specifically recommended for purchases.

The top deck is for full sun and open views. It is a good place to watch the coastline, feel the boat’s movement, and dry off after swimming. The trade-off is direct exposure to the sun, so apply sunscreen before departure and reapply after the swim.

There is no need to stay in one place for the whole trip. You can begin in the shade, move upstairs during the crossing, and return below when the sun becomes too strong. Just keep track of the crew’s instructions for the shipwreck viewing and swimming stop.

A drink from the bar can be convenient, especially after swimming, but factor the extra cost into your budget. At $29 per person, the basic fare is attractive, but drinks and snacks are not part of that price.

What the $29 price really covers

At $29 per person, this is a reasonably priced way to spend two and a half hours on the Aegean. The fare includes the boat trip, the ride to Pserimos, the swimming stop, and the glass-bottom viewing opportunity.

You are paying for a compact sea outing, not a full-day island cruise with meals, equipment, or a long guided tour. That distinction helps set the right expectation. If you want a simple morning or afternoon on the water, the value is good. If you want extensive snorkeling, several islands, or a full meal, you will need a different type of excursion.

The price also works well for families and groups because the activity combines several elements: a fast boat ride, a shipwreck view, swimming, and time near Pserimos. Not everyone has to do the same thing at the stop. One person can swim, another can stay aboard, and someone else can go ashore.

Drinks, snacks, and other beverages are purchased separately. Bring cash so you are not caught without a way to pay at the bar. The boat trip itself is included, but the extras can raise the final cost.

Who will enjoy Dory most

I would choose this outing if you want a short, active sea trip without committing a whole day. It suits people who like boats, swimming, sunny views, and a little speed.

Families may appreciate the slide, the choice of decks, and the manageable length. The 150-minute schedule is long enough to feel worthwhile but short enough for young children who may not handle a full-day cruise well. Parents should still prepare for sun, wind, and close supervision around the water.

Couples and friends can use the trip as a light adventure between sightseeing plans in Kos. The Pserimos stop gives you a change of scene, while the glass-bottom section adds something different from a standard swim boat.

It is less suitable if your main goal is serious snorkeling. The underwater viewing is a brief part of the trip, and the swimming area may not contain much fish. It is also not ideal for anyone who dislikes fast boats, wind, or choppy water.

The activity is listed as unsuitable for people over 95. That is the only stated age restriction, but every person should consider their comfort with boarding, stairs, a moving boat, and swimming from the vessel.

Practical advice for a smoother outing

Arrive ready for the sea rather than treating this like a standard sightseeing cruise. Wear swimwear under your clothes, bring a towel, and apply sunscreen before reaching the port.

Pack these basics:

• Hat and sunglasses
• Sunscreen
• Swimwear and towel
• Cash for drinks and snacks
• A dry layer for the return ride, especially outside the warmest months

Keep your belongings secure on the upper deck. Wind can be strong during the faster parts of the ride, and loose hats or lightweight items may cause trouble.

If you want the best chance of seeing the shipwreck, pay attention to the crew’s announcement. The viewing period is short, so do not assume you can wander over whenever you like. You may also want to stand or sit where you can move easily when the signal comes.

The tour offers free cancellation up to 24 hours before departure, and you can reserve now and pay later. Starting times vary, so check availability for the date you want.

How Dory compares with a full-day cruise

Dory works because it keeps the plan simple. You leave Kos, ride to Pserimos, spend time in and around the water, and return to Kos in 150 minutes.

A full-day cruise may offer more stops and longer time at sea, but it also takes more of your schedule. Dory is a better fit if you want to keep the rest of the day open for Kos Town, the island’s archaeological sites, or a relaxed meal.

The trade-off is variety. You will not see several islands or spend hours exploring different bays. The value comes from combining speed, the glass-bottom feature, and one solid swimming stop into a short outing.

I also like that Pserimos is not treated as a mere photo backdrop. With about 80 minutes, you get enough time to decide how to spend your stop. Still, the stop can feel busy when the boat is full, and the experience is more about enjoying the setting than finding a quiet, untouched cove.

Should you book this Kos to Pserimos trip?

Book it if you want an affordable, easy half-day boat outing with swimming, a fast ride, and one unusual feature in the glass-bottom wreck viewing. The $29 price is especially fair if you plan to use the Pserimos stop fully and do not need lunch or snorkeling equipment included.

Skip it if you want a serious underwater wildlife trip, a quiet private boat, or a full day of island exploration. The glass-bottom view is brief, snorkeling may be modest, and the boat can feel crowded in high season.

For most visitors who want a sunny break from land, Dory offers a good mix of action and simplicity. Pack for heat, carry cash, listen for the shipwreck signal, and think of Pserimos as the main event rather than treating the glass floor as the entire tour.

FAQ

Where does the boat trip begin?

The trip begins at the Port of Kos.

How long does the activity last?

The full activity lasts 150 minutes.

Which island does Dory visit?

Dory travels from Kos to Pserimos and returns to the Port of Kos.

How much time is spent at Pserimos?

The scheduled stop at Pserimos lasts about 80 minutes.

Can I swim at Pserimos?

Yes. The stop includes time for swimming in the sea.

Is snorkeling available?

Yes. Snorkeling is listed as one of the activities at Pserimos, although the trip does not state that equipment is provided.

Can I see a shipwreck?

Yes. The crew signals when to gather around Dory’s thick glass bottom to view an old shipwreck.

Are drinks included in the ticket?

No. Drinks, snacks, and other beverages can be bought onboard for an additional charge.

Should I bring cash?

Yes. Cash is recommended for purchases at the onboard bar.

Which languages are available?

The host or greeter service is available in English, German, Italian, and French.